Table: olympic_luge_event
Columns: sport
record
athlete_s
nation
date
time

Question: What is the time of 12 December 2009 with record start?
SQL: SELECT "time" FROM olympic_luge_event WHERE "record" = 'start' AND "date" = '12 december 2009'

Question: What is Elizabeth Yarnold's nation?
SQL: SELECT "nation" FROM olympic_luge_event WHERE "athlete_s" = 'elizabeth yarnold'