Given a sentence, an entity and its sentiment towards the entity, verify if it is the correct sentiment towards the entity. Answer should be yes or no. Note that URLs in the text have been replaced with [Link].

[EX Q]: Verify if the sentiment of the following document towards the entity Ron Johnson is Negative . "Whole Foods is to grocery  what Target is to mass. It's the upscale discounter "  he  said.
[EX A]: no

[EX Q]: Verify if the sentiment of the following document towards the entity Tim Murphy is Positive .  He  said  he  wants to spend  his  remaining time in office âon mental health care reform  as well as issues affecting working families in southwestern Pennsylvania.â
[EX A]: no

[EX Q]: Verify if the sentiment of the following document towards the entity Sean Boyd is Negative . "One of the things about bitcoin and the cryptocurrencies is  is there really an unlimited supply?"  Boyd  said to "Mad Money" host Jim Cramer on Thursday. "We're gold miners. We mine deposits. I think  over time  the question will be: are these cryptocurrencies and the developers of these cryptocurrencies just mining the public? "
[EX A]:
yes