Complex sentence: The Class NG9 locomotives were observed dumped at the Sá da Bandeira shops by 1969, without their tenders, and at the time appeared as if they had been in that condition for some time.
Split into simpler sentences: The Class NG9 locomotives were observed dumped at the Sá da Bandeira shops by 1969, without their tenders. At the time, it appeared as if they had been in that condition for some time.