The escalator could be anywhere, nothing infers that it is at a mall.  The couple could be on the escalator at any time, there is no way to know if they are shopping or not.  Just because a couple is kissing does not mean that they are feeling sexy, they could be feeling anything.


Context: "A couple kissing while going up the escalator." Claim: "The husband and wife were feeling sexy as they completed their shopping at the mall"
Considering the context, is the claim true, false, or unknown?