def extractLines(file_comments):
    """Extract file/line tuples from file comments for mapping"""
    lines = set()
    for path, comments in file_comments.items():
        for comment in comments:
            if 'line' in comment:
                lines.add((path, int(comment['line'])))
            if 'range' in comment:
                rng = comment['range']
                for key in ['start_line', 'end_line']:
                    if key in rng:
                        lines.add((path, int(rng[key])))
    return list(lines)
