"gold prices rise; copper tops $3" Does the news headline talk about price in the past? Yes

"Gold ekes out a loss to tally fourth straight session decline" Does the news headline talk about price in the future? No

"august gold up $8.70 to $937.30 an ounce on nymex" Does the news headline compare gold with any other asset? No

"Gold turns higher after U.S. retail sales disappoint" Does the news headline talk about price going up? Yes

"Gold prices pare more gains ahead of Comex settlement" Does the news headline talk about price going up? Yes

"december gold down $3.20 at $714.70 an ounce on nymex" Does the news headline talk about a general event (apart from prices) in the past?