human
Considering the provided database schema and associated query, produce SQL code to retrieve the answer to the query. 
###Database Schema: Track, Recorded, Catalogue, Release Date, Chart Peak, Song Title, Writer(s), Time
###Question: On songs with track numbers smaller than number 17 and catalogues of LSP 2231, who are the writer(s)?
gpt
SELECT Writer(s) FROM table WHERE Catalogue = lsp 2231 AND Track < 17