Problem: In a separate mass shooting on Saturday in Pittsburgh, a man donned a bulletproof vest and killed three police officers after he had been driven into a murderous rage by an argument with his mother over a dog. According to court papers, Richard Poplawski who had recently been dishonourably discharged from the US Marines had been arguing with his mother about the dog urinating inside their home early on Saturday morning when she threatened to evict him. When the argument escalated, she called the police. By the time a patrol car turned up at after 7am, Mr Poplawski, 23, had armed himself with an assault rifle, a long-arm rifle, a pistol and several rounds of ammunition.

Based on the paragraph above can we conclude that "Richard also owned a variety of shotguns that he was very proud of."?

A: It's impossible to say

Problem: Just when we thought Pharrell Williams couldn't get any cooler, he becomes the first guy to star in Chanel 's upcoming handbag campaign. Williams has already appeared in a short video by Karl Lagerfeld and even walked the Chanel runway, and now he's modelling the Gabrielle bag from the fashion house's spring collection. Set to join Kristen Stewart, Caroline de Maigret and Cara Delevingne in the campaign - with Lagerfeld taking on the role of photographer - Williams star turn is set to debut on Monday 3 April.

Based on the paragraph above can we conclude that "williams debuted on april 3rd."?

A: Yes

Problem: Christopher Wheeler Christopher Wheeler is a U.S. Banking Analyst at Atlantic Equities LLP. Mr. Wheeler joined Atlantic Equities LLP in 2015, bringing extensive experience to its bank coverage. A qualified Chartered Accountant, Mr. Wheeler held a number of planning roles at Barclays Bank in the 1980s before becoming its first Head of IR. He joined Lehman Brothers in 1988 to cover European banks and has subsequently had senior bank research roles at Fox-Pitt, Kelton, Bear Stearns and Mediobanca.

Based on the paragraph above can we conclude that "He once worked at Mediobanca."?

A:
Yes