Complex sentence: Once at the aviation company, he spends his time flirting with a flight nurse named Helen Munson (Joan Barclay) who is in love with her test pilot boyfriend, Tom Lawson (Dave O'Brien).
Split into simpler sentences: Once at the aviation company, he spends his time flirting with a flight nurse named Helen (Joan Barclay). Helen, though, is in love with her test pilot boyfriend Tom Lawson (Dave O'Brien).