Reduces?

gistfile1.txt

{ "and": [
  { "==" : [ { "var": "gender" }, "women" ] },
  { "and": [
    { "<=" : [ { "var": "age" }, 34 ] },
    { ">=" : [ { "var": "age" }, 25 ] }
  ] },
  { "==": [ { "var": "have_childen" }, true ] }
]}

reduces to:    

{[
  { "==" : [ { "var": "gender" }, "women" ] },
  { "<=" : [ { "var": "age" }, 34 ] },
  { ">=" : [ { "var": "age" }, 25 ] }
  { "==" : [ { "var": "have_childen" }, true ] }
]}

If we're inventing syntax?  :

{[
  [ "gender", "==", "women" ],
  [ "age", "<=", 34 ],
  [ "age", ">=", 25 ],
  [ "have_children", "==", true ]
]}