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: After about a week the larvae leave the nodules and continue to develop into adult worms. 
Sentence2: larvae leave the nodules and continue to transform until having reproductive organs.
answer:
larvae


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


question:
Sentence1: Mutations in somatic cells are called somatic mutations . 
Sentence2: somatic cells perform evolution.
answer:

somatic