A hill may be surrounded by trees.Logical formLearned from19 sentences. A hill can be in a region.Logical formLearned from18 sentences. A hill can be above (sea level).Logical formLearned from18 sentences. A hill can be above a river.Logical formLearned from18 sentences. A hill can be in town.Logical formLearned from18 sentences. A hill can be distinctive.Logical formLearned from18 sentences. Hills may lie.Logical formLearned from18 sentences. Hills can be fortified.Logical formLearned from18 sentences. A list can be constituted-of-or-filled-with hills.Logical formLearned from18 sentences. A person may go_up hills.Logical formLearned from18 sentences. The south may pertain-to a hill.Logical formLearned from18 sentences. Hills can be bare.Logical formLearned from18 sentences. An area can be with rolling hills.Logical formLearned from18 sentences. Hills can be mild.Logical formLearned from18 sentences. A person may go_down a hill.Logical formLearned from18 sentences.