The two four-legged <e1>chickens</e1> were in a <e2>box</e2> under a heat lamp, a temporary lodging until a more spacious cage was available.
The two four-legged chickens
The two four-legged chickens were in a box under a heat lamp, a temporary lodging until a more spacious cage was available.
<triplet> chickens <subject> box <object> Content-Container(e1,e2)