def correspondence(soup):
correspondence = []<EOL>author_notes_nodes = raw_parser.author_notes(soup)<EOL>if author_notes_nodes:<EOL><INDENT>corresp_nodes = raw_parser.corresp(author_notes_nodes)<EOL>for tag in corresp_nodes:<EOL><INDENT>correspondence.append(tag.text)<EOL><DEDENT><DEDENT>return correspondence<EOL>
Find the corresp tags included in author-notes
for primary correspondence