Table: grey_cup_broadcasts_2
Columns: year
network
play_by_play
colour_commentator_s
sideline_reporters
pregame_host
pregame_analysts

Question: What's the average year that sara orlesky and farhan lalji are the sideline reporters?
SQL: SELECT AVG("year") FROM grey_cup_broadcasts_2 WHERE "sideline_reporters" = 'sara orlesky and farhan lalji'