Below is an instruction that describes a task. Write a response that appropriately completes the request.

### Instruction:
How many HC climbs had 1 visit more recently than 1984, a first HC climb before 1994, and a height of 1900?

### Inputs:
table_name: table, columns: ['Height (m.)', 'No. of times visited', 'No. of HC climbs', 'First time as HC climb', 'Most recent']

### Response:
SELECT No. of HC climbs FROM table WHERE No. of times visited = 1 AND Most recent > 1984 AND First time as HC climb < 1994 AND Height (m.) = 1900