Identify the countable noun in the sentence.
After the iron is out of the fire, bellows are used to blow air on it to cool it down.
Fire
Air
Iron
Bellows
The sheet of paper got wet in the rain making it difficult to identify its contents.
Success is failure turned upside down - The silver tint in the clouds of doubt.
Two hundred invitations were sent out but only one-fifty invitations were confirmed.
Some people helped me find my luggage when I lost it in the crowd on my way back.
He is still coming to terms with the failure of his brokerage company.