Table: islemant_ttriders
Columns: rank
rider
team
speed
time

Question: What is the average speed of rider Peter Williams?
SQL: SELECT "speed" FROM islemant_ttriders WHERE "rider" = 'peter williams'

Question: What is the time/s of team Triumph in those races in which Triumph ranked higher than 4?
SQL: SELECT "time" FROM islemant_ttriders WHERE "team" = 'triumph' AND "rank" < 4