Definition: You will be given three sentences. Read them, then identify a noun phrase (person, place, or thing) or event that is shared between all three sentences. As the output, write the span of the text corresponding to that phrase in each sentence. Keep the order of the sentences, that is, your answer should look like: 1: *a phras from sentence 1e* 2: *a phras from sentence 2* 3: *a phrase from sentence 3*
Input: 1: In a race against time , international experts are resorting to science to try to sustain the subspecies . 2: A committee at the conservancy is also looking at various alternative reproduction techniques , including in vitro fertilization . 3: Experts are trying various ways , including in vitro fertilization .

1: science 2: in vitro fertilization 3: in vitro fertilization