user: Question: How many HC climbs had 1 visit more recently than 1984, a first HC climb before 1994, and a height of 1900?
Columns: ['Height (m.)', 'No. of times visited', 'No. of HC climbs', 'First time as HC climb', 'Most recent']
Types: ['text', 'real', 'real', 'real', 'real']
Sample row: ['2744', 2.0, 2.0, 2008.0, 2011.0]
SQL:

assistant: SELECT COUNT("No. of HC climbs") FROM "Table" WHERE "No. of times visited" = 1.0 AND "Most recent" > 1984.0 AND "First time as HC climb" < 1994.0 AND "Height (m.)" = '1900';