A crust can be stiff.Logical formLearned from10 sentences. A crust can be on top.Logical formLearned from10 sentences. Crust may undergo a melting.Logical formLearned from10 sentences. A crust can be layered.Logical formLearned from10 sentences. Crust may undergo a formation.Logical formLearned from9 sentences. Heat can be in a crust.Logical formLearned from9 sentences. A crust may be cut_offed.Logical formLearned from9 sentences. A crust may undergo a shortening.Logical formLearned from9 sentences. Crust may undergo a creation.Logical formLearned from9 sentences. A crust may pertain-to a US-city.Logical formLearned from9 sentences. Regions may pertain-to a crust.Logical formLearned from9 sentences. An element may pertain-to a crust.Logical formLearned from9 sentences. A crust may pertain-to an ocean.Logical formLearned from9 sentences. Breaks can be in a crust.Logical formLearned from9 sentences. A crust can be dense.Logical formLearned from9 sentences.