Read the text and determine if the sentence is true (see options at the end):

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?”

Sentence: At least three witnesses were at the scene
Choose your answer from: (I). Yes (II). It's impossible to say (III). No
(I).