sentences: a popped is a mean of drought & a popped filled with total ->  a balloon filled with helium is an example of a container filled with helium  boy is a mean of viking & arteries are pure rainforests ->  helium is a pure substance  a balloon filled with helium is an example of a container filled with helium & helium is a pure substance -> a balloon filled with helium is an example of a container filled with a pure substance