question: What's the Description for Scottish Tar Distillers No. 78, that's Livery is black, and a date prior to 1897?
answer: SELECT description FROM table_name_49 WHERE livery = "black" AND date < 1897 AND number_ & _name = "scottish tar distillers no. 78"
context: CREATE TABLE table_name_49 (description VARCHAR, livery VARCHAR, date VARCHAR, number_ VARCHAR, _name VARCHAR)