<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def ymd(soup):
 """ Get the year, month and day from child tags """

    day = node_text(raw_parser.day(soup))
    month = node_text(raw_parser.month(soup))
    year = node_text(raw_parser.year(soup))
    return (day, month, year)