def title_prefix(soup):
prefix = None<EOL>display_channel_match_list = ['<STR_LIT>', '<STR_LIT>', '<STR_LIT>']<EOL>for d_channel in display_channel(soup):<EOL><INDENT>if d_channel.lower() in display_channel_match_list:<EOL><INDENT>if raw_parser.sub_display_channel(soup):<EOL><INDENT>prefix = node_text(first(raw_parser.sub_display_channel(soup)))<EOL><DEDENT><DEDENT><DEDENT>return prefix<EOL>
titlePrefix for article JSON is only articles with certain display_channel values