A device constructed to absorb solar energy and convert it to useful heat.
(A device; constructed; to absorb solar energy and convert it to useful heat) Context(A device constructed,List([0, 20))):(A device; constructed to absorb; solar energy) Context(A device constructed,List([0, 20))):(A device; constructed to convert; it; to useful heat)
A device constructed,List([0, 20)) A device constructed,List([0, 20))
A device A device A device
constructed constructed to absorb constructed to convert
to absorb solar energy and convert it to useful heat
solar energy
it to useful heat