Table: liga_club_data
Columns: club
head_coach
city
stadium
2003_2004_season

Question: What club does Manuel Fernandes coach?
SQL: SELECT "club" FROM liga_club_data WHERE "head_coach" = 'manuel fernandes'

Question: Who is the head coach for the club from Estoril?
SQL: SELECT "head_coach" FROM liga_club_data WHERE "city" = 'estoril'

Question: Who is the head coach for the club from Aveiro?
SQL: SELECT "head_coach" FROM liga_club_data WHERE "city" = 'aveiro'