question: What is the height above sea level for the station opened 175.67km from Wellington prior to 1887?
answer: SELECT height_above_sea_level__m_ FROM table_name_2 WHERE opened < 1887 AND distance_from_wellington = "175.67km"
context: CREATE TABLE table_name_2 (height_above_sea_level__m_ VARCHAR, opened VARCHAR, distance_from_wellington VARCHAR)