instruction:
Generate an overlapping word between the given two sentences. When you find the overlapping words, they don't have to match exactly, e.g., "survival" and "survive" are valid overlapping words. Little words like "the" or "of" don't count! You must generate significant words which are not the stop words.
question:
Sentence1: Warm temperatures have helped plant growth and sizing. 
Sentence2: a greenhouse helps  plant growth.
answer:
growth


question:
Sentence1: Acids dissolve in base and turn blue litmus red. 
Sentence2: acid changes color.
answer:
Acids


question:
Sentence1: Flatworms belong to the phylum Platyhelminthes. 
Sentence2: Somethign belonging to the phylum Platyhelminthes has a brain.
answer:

Platyhelminthes