a solar generation is a mean of preposition
durational_preposition is not temporal_preposition. temporal_preposition is preposition. spatial_preposition is preposition. durational_preposition is temporal_preposition. intransitive_preposition is adverb. intransitive_preposition is not adverb. preposition_of is preposition. generation is production. preposition_of is not preposition. temporal_preposition is not preposition.