Complex sentence: During a job in which he was to install an intercom at the lab, he met two secretaries, one of whom married Seaborg and the other, Wilma Belt, who became Albert's wife of 60 + years.
Split into simpler sentences: During a job in which he was to install an intercom at the lab, he met two secretaries, one of whom married Seaborg. The other, Wilma Belt, became Albert's wife of 60 + years.