Complex sentence: These conditions are for the most part semantic in nature, though Clements also claimed that there are additional syntactic factors which may play a role when semantic conditions are not met, yet logophoric pronouns are still present.
Split into simpler sentences: These conditions are for the most part semantic in nature. However, Clements also claimed that there are additional syntactic factors which may play a role when semantic conditions are not met, yet logophoric pronouns are still present.