Table: sculling_championships
Columns: year
date
champion
beat
time
course

Question: WHAT CHAMPION HAD RICHMOND RIVER COURSE ON JUNE 13?
SQL: SELECT "champion" FROM sculling_championships WHERE "course" = 'richmond river' AND "date" = 'june 13'

Question: WHAT YEAR WAS ROBERT COOMBES CHAMPION ON MAY 7?
SQL: SELECT COUNT("year") FROM sculling_championships WHERE "champion" = 'robert coombes' AND "date" = 'may 7'