The main sentence (independent clause or the main clause) is an independent body that has a complete sentence in itself. There is an extension of the Chairman and not himself. Another sentence.
The main sentence (main clause or independent clause) is a body completely independent with its own president and is an extension of themselves, not directly to another sentence.
Main clause (main clause or independent clause) is a sentence independently with perfect body in itself, is president and not directly to their own extensions. Another sentence