Table: memorial_tourney_2
Columns: year
player
country
score
margin_of_victory
winner_s_share

Question: What is south africa's margin of victory?
SQL: SELECT "margin_of_victory" FROM memorial_tourney_2 WHERE "country" = 'south africa'

Question: Which Score has a Year larger than 1980, and a Margin of victory of 2 strokes, and a Country of united states, and a Player of jim furyk?
SQL: SELECT "score" FROM memorial_tourney_2 WHERE "year" > 1980 AND "margin_of_victory" = '2 strokes' AND "country" = 'united states' AND "player" = 'jim furyk'

Question: Which average Winner's share ($) has a Score of 281 (−7), and a Player of hale irwin, and a Year smaller than 1983?
SQL: SELECT AVG("winner_s_share") FROM memorial_tourney_2 WHERE "score" = '281 (−7)' AND "player" = 'hale irwin' AND "year" < 1983