inputs: hypothesis: The Greater Manchester Ambulance Service offices are located in Salford. premise: Over fifty firefighters are damping down after a tanker exploded at an industrial unit in Salford in Greater Manchester. At one point, thick smoke could be seen drifting across Manchester city centre. According to Greater Manchester Ambulance Service, no one has been hurt as a result of the explosion. A fire service spokesman said a Heavy Goods Vehicle and a nearby building were engulfed in flames.