A crash can be hollow.Logical formLearned from2 sentences. A peel can be hollow.Logical formLearned from2 sentences. A pall can be hollow.Logical formLearned from2 sentences. Footsteps of some impostor of a mooning may fall hollow.Logical formLearned from2 sentences. A thrum can be hollow.Logical formLearned from2 sentences. Persons can be hollow.Logical formLearned from2 sentences. An applause can be hollow.Logical formLearned from2 sentences. A torso can be hollow.Logical formLearned from2 sentences. Horns can be hollow.Logical formLearned from2 sentences. A fish-spine can be hollow.Logical formLearned from2 sentences. Place-s can be hollow.Logical formLearned from2 sentences. Horns can be hollow.Logical formLearned from2 sentences. Horns of animals can be hollow for a distance.Logical formLearned from2 sentences. A curving can be hollow.Logical formLearned from2 sentences. A heap can be hollow.Logical formLearned from2 sentences.