What structure is used in the sentence We laughed so hard we cried but finally everyone calmed down?

The sentence "We laughed so hard we cried but finally everyone calmed down" uses a compound-complex structure. It contains two independent clauses, "We laughed so hard we cried" and "everyone calmed down," joined by the conjunction "but." The phrase "finally" serves as an adverb modifying the second clause, adding a temporal element to the sequence of events.