As they were developing the detector, Sivathanu, Gore and their graduate students examined the near-infrared radiation - or heat - given off by several "standard" types of fires.
(they; were developing; the detector, Sivathanu, Gore and their graduate students examined the near-infrared radiation - or heat - given off by several "standard" types of fires) (Gore and their graduate students; examined; T:As they were developing the detector)
they Gore and their graduate students
were developing examined
the detector, Sivathanu, Gore and their graduate students examined the near-infrared radiation - or heat - given off by several "standard" types of fires
T:As they were developing the detector