Part may pertain-to hills.Logical formLearned from12 sentences. Hills may surround a lake.Logical formLearned from12 sentences. Hills can be behind persons.Logical formLearned from12 sentences. A hill may be surrounded by floodwaters.Logical formLearned from12 sentences. Persons may see a hill.Logical formLearned from12 sentences. An airliner may hit a hill.Logical formLearned from12 sentences. A hill can be illuminated.Logical formLearned from12 sentences. A female may stand on a hill.Logical formLearned from12 sentences. Chunks of hill may collapse.Logical formLearned from12 sentences. Chunks can be constituted-of-or-filled-with hill.Logical formLearned from12 sentences. A settlement can be on a hill.Logical formLearned from12 sentences. A ridge can be constituted-of-or-filled-with hills.Logical formLearned from12 sentences. A hill may collapse.Logical formLearned from12 sentences. Plumes of smoke may rise above hills.Logical formLearned from12 sentences. An event can be on a hill.Logical formLearned from12 sentences.