What's the West Germanic when the German is /s/ or /ts/?
CREATE TABLE table_name_90 (
    west_germanic VARCHAR,
    german VARCHAR
)
SELECT west_germanic FROM table_name_90 WHERE german = "/s/ or /ts/"
Below are sql tables schemas paired with instruction that describes a task. Using valid SQLite, write a response that appropriately completes the request for the provided tables. ### Instruction: What's the West Germanic when the German is /s/ or /ts/? ### Input: CREATE TABLE table_name_90 (
    west_germanic VARCHAR,
    german VARCHAR
) ### Response: SELECT west_germanic FROM table_name_90 WHERE german = "/s/ or /ts/"