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.

Sentence1: Similarly, stars are referred to as suns, but our star is the Sun. 
Sentence2: our star causes water to evaporate more quickly by adding heat.
our

Sentence1: if an object is made of a material then that object has the properties of that material. 
Sentence2: An object is an item in the real world.
object

Sentence1: Transcription takes place in the nucleus. 
Sentence2: Transcription of DNA into mRNA occurs in the nucleus.

Transcription