Table: wafl_premiers
Columns: season
premiers
runners_up
score
captain
coach
simpson_medal
venue
attendance
umpires

Question: Who were the umpires when Paul Medhurst (C) won the Simpson Medal?
SQL: SELECT "umpires" FROM wafl_premiers WHERE "simpson_medal" = 'Paul Medhurst (C)'

Question: Who were the umpires when Paul Vines (S) won the Simpson Medal?
SQL: SELECT "umpires" FROM wafl_premiers WHERE "simpson_medal" = 'Paul Vines (S)'

Question: Which venue did Luke Blackwell serve as captain?
SQL: SELECT "venue" FROM wafl_premiers WHERE "captain" = 'Luke Blackwell'