article_snippet.sent: Firefighters, police and ambulance crews worked  to free the boy, who was trapped for more than half an hour .
article_snippet.sent: An East of England Ambulance service spokesman was discharged from scene and was not taken to hospital.'
article_snippet.sent: Two fire crews and an ambulance were also on scene. '
article_snippet.sent: Cambridgeshire Police said Two fire crews and an ambulance were on scene to help free the boy .
highlights_snippet.sent: Rescue crews worked to free the boy, who remained stuck for half an hour .
  