Table: alberta_greens_election_data
Columns: election
of_candidates_nominated
of_seats_won
of_total_votes
of_popular_vote

Question: What is the earliest election with more than 7 candidates nominated, a percentage of the popular vote of 2.75%, and 0 seats won?
SQL: SELECT MIN("election") FROM alberta_greens_election_data WHERE "of_candidates_nominated" > 7 AND "of_popular_vote" = '2.75%' AND "of_seats_won" < 0