Table: pga_tour_1988
Columns: date
tournament
location
winner
score
1st_prize

Question: What is the amount of the 1st prize when the Winner was ken green (4)?
SQL: SELECT "1st_prize" FROM pga_tour_1988 WHERE "winner" = 'ken green (4)'

Question: What is the date of the Los Angeles open?
SQL: SELECT "date" FROM pga_tour_1988 WHERE "tournament" = 'los angeles open'

Question: What is the name of the Tournament on oct 23?
SQL: SELECT "tournament" FROM pga_tour_1988 WHERE "date" = 'oct 23'