sentences: physical star are formed by chemically 5 need
docs: ocimene is chemical_compound. silicon_carbide is chemical_compound. developing_chemical_weapons is developing_product. fox_7 is chemical_compound. stars is balls_of_burning_gas. protostellar_core is molecular_core. group_of_stars is naturally_occurring_tangible_substance. chemical_purity is tangible_physical_quantity. making_sauces is physical_creation_event. molecular_beam_epitaxy is physical_vapor_deposition.