Table: danish_grand_prix
Columns: year
driver
constructor
location
formula
report

Question: What type of formula did Stirling Moss drive?
SQL: SELECT "formula" FROM danish_grand_prix WHERE "driver" = 'Stirling Moss'

Question: What year did Randy Lewis drive?
SQL: SELECT "year" FROM danish_grand_prix WHERE "driver" = 'Randy Lewis'

Question: What was the constructor in 1975?
SQL: SELECT "constructor" FROM danish_grand_prix WHERE "year" = 1975