Complex sentence: Therefore the Yemenite citron is the only pulpless citron used as etrog, according to the Yemenite tradition that is claimed to trace back to the The First Temple, their kind was with them all the times.
Split into simpler sentences: Therefore the Yemenite citron is the only pulpless citron used as etrog. According to the Yemenite tradition that is claimed to trace back to the The First Temple, their kind was with them all the times.