user: Question: How many candidates were there in the year of 1987?
Columns: ['Year', 'Number of Candidates', 'Total votes', 'Average voters per candidate', 'Percentage of vote', 'Saved deposits', 'Change (percentage points)', 'Number of MPs']
Types: ['text', 'real', 'real', 'real', 'text', 'real', 'text', 'real']
Sample row: ['1970', 10.0, 11449.0, 1145.0, '0.04', 0.0, 'N/A', 0.0]
SQL:

assistant: SELECT "Number of Candidates" FROM "Table" WHERE "Year" = '1987';