Can we draw the following hypothesis from the context (see options)? 

Context:

Steam or smoke is seen pouring from the open manhole in Old Street in a shocking video taken at the scene. A pile of rubble is by the manhole cover as shocked witnesses gather at the scene. One person can be heard saying: “It exploded!” Another can be says: “What the f**k! Oh my God.” A third said: “That was scary. Did anyone get hurt?”

Hypothesis: A witness used swear words.
Choose your answer from: + Yes. + It's impossible to say. + No.