Individuals may contribute.Logical formLearned from18 sentences. Immigrants may contribute to the economy.Logical formLearned from18 sentences. Persons may contribute to a debate.Logical formLearned from18 sentences. A person may contribute to a field.Logical formLearned from18 sentences. A person may contribute an amount.Logical formLearned from18 sentences. Writers may contribute a report.Logical formLearned from18 sentences. Nations may contribute.Logical formLearned from18 sentences. A person may contribute to a forum.Logical formLearned from18 sentences. Opposition may contribute to months of delays.Logical formLearned from18 sentences. Amount may contribute to a candidate.Logical formLearned from18 sentences. Editors may contribute to a story.Logical formLearned from18 sentences. Demonstrations may contribute to a coup.Logical formLearned from18 sentences. A person may contribute work.Logical formLearned from17 sentences. A male may contribute a song.Logical formLearned from17 sentences. A female may contribute to a project.Logical formLearned from17 sentences.