query: SELECT date ,  cloud_cover FROM weather ORDER BY cloud_cover DESC LIMIT 5
question: What date that have 5 most high cloud cover rate and what are rate?
query_toks: SELECT date , cloud_cover FROM weather ORDER BY cloud_cover DESC LIMIT 5
query_toks_no_value: select date , cloud_cover from weather order by cloud_cover desc limit value
question_toks: What date that have 5 most high cloud cover rate and what are rate?