Persons may come upon a labyrinth of chasms.Logical formLearned from1 sentences. Some fellows may move on a brink of a chasm.Logical formLearned from1 sentences. A person may look_down into a chasm.Logical formLearned from1 sentences. Chasms can be open.Logical formLearned from1 sentences. An outside may pertain-to a chasm.Logical formLearned from1 sentences. A foot of a ladder may be planted on an outside of a chasm.Logical formLearned from1 sentences. Chasms may be formed.Logical formLearned from1 sentences. A chasm can be at a foot of a mountain.Logical formLearned from1 sentences. Chasms can be in (mountain sides).Logical formLearned from1 sentences. Chasms can be vertical.Logical formLearned from1 sentences. Chasms may pertain-to a crater.Logical formLearned from1 sentences. Persons may look_down into a chasm.Logical formLearned from1 sentences. A river may run_along in a bottom of a chasm.Logical formLearned from1 sentences. A chasm can be in a middle.Logical formLearned from1 sentences. A chasm can be in a us-state.Logical formLearned from1 sentences.