Sentence 1: Psittacosaurids were basal to almost all known ceratopsians except `` Yinlong '' and perhaps the Chaoyangsauridae .
Sentence 2: Almost all Basal - Ceratopsians except `` Yinlong '' and perhaps the Chaoyangsauridae were known .
Question: Do Sentence 1 and Sentence 2 express the same meaning? Yes or No?