example.py

import json
import sys

for line in sys.stdin:
    # remove newline
    line = line.rstrip()
    # parse JSON
    item = json.loads(line)
    # get title
    title = item.get('title', '')
    # get body
    body = item.get('body', '')
    # filter for russia
    if 'russia' in (title + body).lower():
        print(line)