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