Table:
text: Sunline
Race record
1999-00 Season as a Four Year Old
Result_ Date_ Race Venue Group_ Distance Weight_kg Jockey Winner_2nd
Won 20 November 1999 Breeders Stakes Pukekohe G2 1400 m 54.5 G. Childs 2nd - Soap Opera
7th 12 December 1999 Hong Kong Cup Sha Tin G1 2000 m 56 G. Childs 1st - Jim And Tonic
Won 11 March 2000 Apollo Stakes Warwick Farm G2 1400 m 55.5 G. Childs 2nd - Adam
Won 1 April 2000 Coolmore Classic Rosehill G1 1500 m 60 G. Childs 2nd - Beat The Fade
2nd 22 April 2000 Doncaster Randwick G1 1600 m 57.5 G. Childs 1st - Over

Question: How many Sunline teams in the 1999/00 season as four year old race records had an overall weight of 57.5?