Table: afl_prelim_series_champs_2
Columns: year
winners
grand_finalist
scores
venue
crowd
margin
season_result

Question: What scores did grand finalist hawthorn have?
SQL: SELECT "scores" FROM afl_prelim_series_champs_2 WHERE "grand_finalist" = 'hawthorn'

Question: What grand finalist had a year after 1979, a margin smaller than 30, and winners of essendon?
SQL: SELECT "grand_finalist" FROM afl_prelim_series_champs_2 WHERE "year" > 1979 AND "margin" < 30 AND "winners" = 'essendon'