He noticed a speck of blood on the <e1>man</e1>'s <e2>thumb</e2> and what he thought were several corresponding drops on the driver's door of the truck.
He noticed a speck
He noticed a speck of blood on the man's thumb and what he thought were several corresponding drops on the driver's door of the truck.
<triplet> man <subject> thumb <object> Component-Whole(e2,e1)