for match in xmldata.findall("events/event"):
  if match.findtext('periods/period/period_description') == "Game" and match.findtext('sporttype') == "Soccer":
    participant1 = match.findall('participants/participant')[0]
    participant2 = match.findall('participants/participant')[2]
    if participant1.findtext('participant_name') in ['Atletico Madrid'] and participant2.findtext('participant_name') in ['Liverpool']:
          print match