Table: tallest_statues_us
Columns: statue
location
height_m
height_ft
completed
material

Question: What was the statue in st. paul, minnesota constructed before 1966 made out of?
SQL: SELECT "material" FROM tallest_statues_us WHERE "completed" < 1966 AND "location" = 'st. paul, minnesota'

Question: When was the most recent statue that was made out of solid granite completed?
SQL: SELECT MAX("completed") FROM tallest_statues_us WHERE "material" = 'solid granite'