Table: giro_1990_results
Columns: date
course
distance
type
winner

Question: What type has a date of 1 june?
SQL: SELECT "type" FROM giro_1990_results WHERE "date" = '1 june'

Question: What was the date with a hilly stage?
SQL: SELECT "date" FROM giro_1990_results WHERE "type" = 'hilly stage'

Question: What is the name of the winner on 18 may?
SQL: SELECT "winner" FROM giro_1990_results WHERE "date" = '18 may'

Question: What date was moena to aprica the course?
SQL: SELECT "date" FROM giro_1990_results WHERE "course" = 'moena to aprica'

Question: What is the name of the winner with a type of plain stage and a Course of nola to sora?
SQL: SELECT "winner" FROM giro_1990_results WHERE "type" = 'plain stage' AND "course" = 'nola to sora'