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: Echinoderms use pheromones to communicate with each other. 
Sentence2: Echinoderms are known for their round symmetry.
answer:
Echinoderms


question:
Sentence1: Landslides Seismic vibration is a common triggering mechanism for landslides. 
Sentence2: Erosion can cause seismic vibrations which are triggering mechanisms.
answer:
Seismic


question:
Sentence1: Cells that divide uncontrollably may form a tumor, or abnormal mass of cells. 
Sentence2: Cells that divide uncontrollably may form cancer growth.
answer:

Cells