def find_start(token_list):

    """Finds starting index of answer tokens, skipping newlines and prefixes"""

    idx_start = 0

    while token_list[idx_start] == '\n':  # ignore starting newlines
        idx_start += 1

    # if answer starts with 'A:', skip these tokens
    if (token_list[idx_start] == 'A') and (token_list[idx_start + 1] == ':'):
        idx_start += 2

    return idx_start