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: Houthi supreme leader Abdul Malik al-Houthi spoke live Thursday night in Yemen on al-Masirah TV , saying ,  If any army try to invade our country , we will prove that Yemen will be a grave for those who invade us .  2: He added ,  We call on the invaders to stop the attacks and if the airstrikes do not end then we will escalate in the needed manner .  3: Houthi leader says rebels will escalate response if airstrikes continue , make Yemen a grave for Saudis .

1: Houthi supreme leader Abdul Malik al-Houthi 2: He 3: Houthi leader