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: Through an emission of sound waves , sensations are projected through the air and to the user . 2: What you 're feeling , what sort of pressure , the tactile sensation given by an object or surface . 3: A tactile sensation is provided by ultrasonic waves , which alter air pressure .

1: sensations 2: the tactile sensation given by an object or surface 3: A tactile sensation