A gravitational energy can be enough.Logical formLearned from1 sentences. A rock may be held captive by a gravitational pull.Logical formLearned from1 sentences. A gravitational pull may pertain-to institutions.Logical formLearned from1 sentences. Stars may be pulled around a center by a gravitational force of an object.Logical formLearned from1 sentences. Interactions can be with a gravitational field.Logical formLearned from1 sentences. Leaders may exhibit a gravitational pull by presenting themselves.Logical formLearned from1 sentences. A gravitational field may yank materials.Logical formLearned from1 sentences. A cracking may occur in response to a gravitational field.Logical formLearned from1 sentences. Response can be to a gravitational field.Logical formLearned from1 sentences. A gravitational force may pertain-to black holes.Logical formLearned from1 sentences. A gravitational field can be strong that something-is-the-case.Logical formLearned from1 sentences. A cocoon can be gravitational.Logical formLearned from1 sentences. Atoms of hydrogen may escape a gravitational pull.Logical formLearned from1 sentences. A gravitational pull may cause tides.Logical formLearned from1 sentences. An object may have a gravitational field.Logical formLearned from1 sentences.