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.

[Q]: Sentence1: Babies that are very large or very small at birth are less likely to survive. 
Sentence2: Babies that are very large or very small at birth are less likely to live.
[A]: Babies


[Q]: Sentence1: Silica sand is primarily mined from sandstone deposits. 
Sentence2: erosion forms silica sand.
[A]: Silica


[Q]: Sentence1: Gametophytes are the parent of the baby fern. 
Sentence2: female parents of a baby fern produce eggs inside the ovaries of flowers.
[A]:
baby