A scalar may measure a gravitational attraction of a source.Logical formLearned from2 sentences. A gravitational attraction may pertain-to a source.Logical formLearned from2 sentences. A gravitational potential energy may be converted into kinetic energy.Logical formLearned from2 sentences. A gravitational field may pull on a (mass cart).Logical formLearned from2 sentences. A star may pass behind a gravitational lens.Logical formLearned from2 sentences. Motion can be in a gravitational field.Logical formLearned from2 sentences. An assembly of structures may be governed by gravitational physics.Logical formLearned from2 sentences. Expertise can be in gravitational physics.Logical formLearned from2 sentences. An object can be in a gravitational field.Logical formLearned from2 sentences. A gravitational force can be on a person.Logical formLearned from2 sentences. Modes can be gravitational.Logical formLearned from2 sentences. A gravitational pull may pertain-to economics.Logical formLearned from2 sentences. A gravitational attraction can be powerful.Logical formLearned from2 sentences. A (model refinement) can be gravitational.Logical formLearned from2 sentences. Gravitational waves can be hard.Logical formLearned from2 sentences.