How many results did the GT1 Winning Team No. 50 Larbre Compétition on the Algarve circuit?
create table table_24865763_2 (results varchar, circuit varchar, gt1_winning_team varchar, PRIMARY KEY (results))
select count(results) from table_24865763_2 where circuit = "algarve" and gt1_winning_team = "no. 50 larbre compétition"