"gold turns lower after u.s. productivity data" Does the news headline talk about price in the past? Yes

"commodity bets: buy copper, gold, silver; sell crude" Does the news headline compare gold with any other asset? Yes

"gold rises for second day" Does the news headline talk about price? Yes

"Gold holds sharp gains after U.S. data" Does the news headline talk about price in the past? Yes

"gold futures climb near $1,378/oz on globex" Does the news headline talk about price staying constant? No

"gold futures drop over $9 to end at five-month low" Does the news headline talk about a general event (apart from prices) in the past?