query: SELECT open_year FROM branch GROUP BY open_year HAVING count(*)  >=  2
question: List all open years when at least two shops are a-opened.
query_toks: SELECT open_year FROM branch GROUP BY open_year HAVING count ( * ) > = 2
query_toks_no_value: select open_year from branch group by open_year having count ( * ) > = value
question_toks: List all open years when at least two shops are a-opened.