A river can be a tributary of a river.Logical formLearned from7 619 sentences. A tributary may pertain-to a river.Logical formLearned from1 069 sentences. Tributaries may pertain-to a river.Logical formLearned from521 sentences. A tributary can be to a river.Logical formLearned from298 sentences. A tributary can be unnamed.Logical formLearned from269 sentences. A river can be a tributary of a river.Logical formLearned from203 sentences. A river can be a tributary of a male.Logical formLearned from200 sentences. A male can be a tributary of a river.Logical formLearned from197 sentences. Tributaries may pertain-to a river.Logical formLearned from141 sentences. Tributaries may be indented under a name.Logical formLearned from117 sentences. Tributaries may pertain-to a us-state.Logical formLearned from94 sentences. A river can be a tributary.Logical formLearned from87 sentences. A tributary can be short.Logical formLearned from81 sentences. Tributaries may pertain-to a river.Logical formLearned from77 sentences. Tributaries can be to a river.Logical formLearned from76 sentences.