Formats and their image fields

["Athena (Accordion)",
 [["Slide 1 Image", "slide_1"],
  ["Slide 2 Image", "slide_2"],
  ["Slide 3 Image", "slide_3"],
  ["Slide 1 Small Image", "slide_1_small"],
  ["Slide 2 Small Image", "slide_2_small"],
  ["Slide 3 Small Image", "slide_3_small"],
  ["Logo", "logo"]]]
["Athena (Carousel)",
 [["Background Image", "lrg_image"],
  ["Box 1 Image", "box_1_img"],
  ["Box 2 Image", "box_2_img"],
  ["Box 3 Image", "box_3_img"],
  ["Logo", "logo"]]]
["Athena (Cinemagraph)",
 [["Large Screen Image", "lrg_image"],
  ["Medium Screen Image", "med_image"],
  ["Small Screen Image", "sml_image"],
  ["Overlay Image", "overlay_image"]]]
["Athena (Custom)",
 [["Large Screen Image", "lrg_image"],
  ["Medium Screen Image", "med_image"],
  ["Small Screen Image", "sml_image"],
  ["Overlay Image", "overlay_image"]]]
["Athena (Image)",
 [["Large Screen Image", "lrg_image"],
  ["Medium Screen Image", "med_image"],
  ["Small Screen Image", "sml_image"],
  ["Overlay Image", "overlay_image"]]]
["Athena (Immersion)",
 [["Background Image", "lrg_image"],
  ["Video Cover Thumbnail", "thumbnail_cover"],
  ["Small Screen Image", "sm_image"],
  ["Logo", "logo"]]]
["Athena (Mobile Autoplay Video)",
 [["Background Image", "sm_image"],
  ["Video Thumbnail", "video_thumb"],
  ["Logo Image", "logo"]]]
["Athena (Parallax)",
 [["Background Image", "lrg_image"],
  ["Large Breakpoint Parallax Layer 1", "large_parallax_image_one"],
  ["Large Breakpoint Parallax Layer 1", "large_parallax_image_two"],
  ["Medium Screen Image", "med_image"],
  ["Small Screen Image", "sml_image"]]]
["Athena (Slideshow)",
 [["Slide 1 Image", "slide_1"],
  ["Second Image", "slide_2"],
  ["Third Image", "slide_3"],
  ["Slide 1 Mobile Image", "slide_1_mobile"],
  ["Slide 2 Mobile Image", "slide_2_mobile"],
  ["Slide 3 Mobile Image", "slide_3_mobile"],
  ["Logo", "logo"]]]
["Athena (Video)",
 [["Large Screen Image", "lrg_image"],
  ["Medium Screen Image", "med_image"],
  ["Small Screen Image", "sml_image"],
  ["Overlay Image", "overlay_image"]]]
["Athena (Wildcard)",
 [["Background Image", "lrg_image"],
  ["Box 1 Image", "box_1_img"],
  ["Small Screen Image", "sml_image"],
  ["Logo", "logo"],
  ["Box 2 Image", "box_2_img"],
  ["Box 3 Image", "box_3_img"],
  ["Box 4 Image", "box_4_img"],
  ["Box 5 Image", "box_5_img"],
  ["Box 6 Image", "box_6_img"]]]
["Buyable Interlude",
 [["Lead Product Image", "lead_image"],
  ["Second Product Image", "second_image"],
  ["Third Product Image", "third_image"],
  ["Large Logo", "large_logo"],
  ["Icon Logo", "icon_logo"]]]
["Prelude Apex", [["Brand Logo", "logo"], ["Main Image", "image_one"]]]
["Mobile Gyroscope",
 [["Background Image", "background_image"], ["Brand Logo", "logo"]]]
["Video Interlude", [["Trailer Image", "trailer_image"]]]
["Native Ad Collection (Fade)",
 [["Sponsor, Logo", "sponsor_logo"],
  ["Main, Splash Image", "splash_image"],
  ["Episode, 1 Image", "ep1_image"],
  ["Episode, 2 Image", "ep2_image"],
  ["Episode, 3 Image", "ep3_image"],
  ["Campaign, Logo Image", "campaign_logo"]]]
["Native Ad Content Link",
 [["Thumbnail", "thumbnail"], ["Sponsored Logo", "logo"]]]
["Native Ad Latest",
 [["Thumbnail", "thumbnail"], ["Sponsored Logo", "sponsored_logo"]]]
["Native Ad Linkset Link", [["Sponsored Logo", "logo"]]]
["Native Ad Mobile", [["Sponsored Logo", "logo"], ["Thumbnail", "thumbnail"]]]
["Native Ad Sponsored Link",
 [["Thumbnail", "thumbnail"], ["Sponsored Logo", "logo"]]]
["Native Ad Collection (Static)",
 [["Sponsor Logo", "sponsor_logo"],
  ["Episode 1 Image", "ep1_image"],
  ["Episode 2 Image", "ep2_image"],
  ["Episode 3 Image", "ep3_image"],
  ["Campaign Logo Image", "campaign_logo"]]]
["Native Ad Video", [["Thumbnail", "thumbnail"], ["Sponsored Logo", "logo"]]]
["Bookmark (Editorial Apps)",
 [["Overlay Image", "overlay_image"],
  ["Background Image", "background_image"],
  ["Mobile background image", "mobile_background"],
  ["Mobile overlay image", "mobile_overlay"]]]
["Cardstack (Vox.com)",
 [["Ad 1 - Overlay Image", "overlay_image_1"],
  ["Ad 1 - Background Image", "background_image_1"],
  ["Ad 2 - Overlay Image", "overlay_image_2"],
  ["Ad 2 - Background Image", "background_image_2"]]]
["Prelude (Regular)",
 [["Large Screen Image", "lrg_image"],
  ["Small Screen Image", "sml_image"],
  ["Overlay Image", "overlay_image"]]]
["Prelude (Accordion)",
 [["Slide 1 Image", "slide_1"],
  ["Slide 2 Image", "slide_2"],
  ["Slide 3 Image", "slide_3"],
  ["Slide 1 Small Image", "slide_1_small"],
  ["Slide 2 Small Image", "slide_2_small"],
  ["Slide 3 Small Image", "slide_3_small"],
  ["Logo", "logo"]]]
["Prelude (Carousel)",
 [["Background Image", "lrg_image"],
  ["Box 1 Image", "box_1_img"],
  ["Box 2 Image", "box_2_img"],
  ["Box 3 Image", "box_3_img"],
  ["Logo", "logo"]]]
["Prelude (Cinemagraph)",
 [["Large Screen Image", "lrg_image"],
  ["Small Screen Image", "sml_image"],
  ["Overlay Image", "overlay_image"]]]
["Prelude (Immersion)",
 [["Background Image", "lrg_image"],
  ["Video Cover Thumbnail", "thumbnail_cover"],
  ["Logo", "logo"]]]
["Prelude (Slideshow)",
 [["Slide 1 Image", "slide_1"],
  ["Slide 1 Mobile Image", "slide_1_mobile"],
  ["Slide 2 Image", "slide_2"],
  ["Slide 2 Mobile Image", "slide_2_mobile"],
  ["Slide 3 Image", "slide_3"],
  ["Slide 3 Mobile Image", "slide_3_mobile"],
  ["Logo", "logo"]]]
["Prelude (Video)",
 [["Large Screen Image", "lrg_image"],
  ["Small Screen Image", "sml_image"],
  ["Overlay Image", "overlay_image"]]]
["Prelude (Wildcard)",
 [["Background Image", "lrg_image"],
  ["Box 1 Image", "box_1_img"],
  ["Box 2 Image", "box_2_img"],
  ["Box 3 Image", "box_3_img"],
  ["Box 4 Image", "box_4_img"],
  ["Box 5 Image", "box_5_img"],
  ["Box 6 Image", "box_6_img"],
  ["Small Screen Image", "sml_image"],
  ["Logo", "logo"]]]
["Responsive Reskin",
 [["Left Background Image", "left_image"],
  ["Right Background Image", "right_image"],
  ["Center Background Image", "center_image"]]]
["Top Hat (Reskin)", [["Background Image", "background_image"]]]
["Legacy Ad", []]
["Native Ad Mobile Video",
 [["Sponsored Logo", "logo"], ["Thumbnail Image", "thumbnail"]]]
["In-Article Mobile Anchor", [["Image", "image"]]]
["Athena (Storyteller)",
 [["Large Screen Image", "lrg_image"], ["Small Screen Image", "sml_image"]]]