Rate the similarity of the following two sentences
Israel threatens action against Gaza aid ship
Israel attacks in Gaza Strip after rocket fire

2

Rate the similarity of the following two sentences
Philadelphia building collapses, 8-10 people may be trapped
Philadelphia building collapses; reports of people trapped

4

Rate the similarity of the following two sentences
Dean told reporters traveling on his 10-city "Sleepless Summer" tour that he considered campaigning in Texas a challenge.
Today, Dean ends his four-day, 10-city "Sleepless Summer" tour in Chicago and New York.
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