Table:
text: 1979 England rugby union tour of Japan, Fiji and Tonga
Matches
Matches
Opposing_Team Against Date_ Venue Status_
Japan `B` 7 10/05/1979 Tokyo Tour Match
Japan 19 13/05/1979 Kintetsu Hanazono Stadium , Osaka First `Test`
Kyūshū 3 16/05/1979 Fukuoka Tour Match
Japan 18 20/05/1979 Olympic Stadium , Tokyo Second `Test`
Fiji Juniors 22 25/05/1979 Lautoka Tour Match
Fiji 7 29/05/1979 National Stadium , Suva `Test` Match
Tonga 17 01/06/1979 Teufaiva Sport Stadium , Nuku ʻ alofa `Test` Match

Question: In the 1979 England Rugby Union tour in Japan, Fiji and Tonga, which opposing team has an equivalent of less than 19 and a date of 20/05/1979?