A country may contribute some troops to an invasion of a country.Logical formLearned from9 sentences. States may contribute.Logical formLearned from9 sentences. A country may contribute to an operation.Logical formLearned from9 sentences. An order may contribute to stability of a situation.Logical formLearned from9 sentences. Gases may contribute to a (greenhouse effect).Logical formLearned from9 sentences. A decision may contribute to reinforcing a blockade.Logical formLearned from9 sentences. Acts may contribute to deaths.Logical formLearned from9 sentences. A US-city may contribute some percent of a budget.Logical formLearned from9 sentences. Need of energy may contribute in part.Logical formLearned from9 sentences. A rise may contribute to an increase.Logical formLearned from9 sentences. Countries may contribute troops to a mission.Logical formLearned from9 sentences. Medical personnel may contribute a time.Logical formLearned from9 sentences. A country may contribute some personnel.Logical formLearned from9 sentences. The climate may contribute to an incident.Logical formLearned from9 sentences. An outlook may contribute to pressure.Logical formLearned from9 sentences.