user: Question: What is the average pick of player paul maclean, who had a draft before 1978?
Columns: ['Draft', 'Round', 'Pick', 'Player', 'Nationality']
Types: ['real', 'real', 'real', 'text', 'text']
Sample row: [1968.0, 1.0, 6.0, 'Gary Edwards', 'Canada']
SQL:

assistant: SELECT AVG("Pick") FROM "Table" WHERE "Player" = 'paul maclean' AND "Draft" < 1978.0;