Question

Read the sentence. You can visit Thomas Edison’s winter home, which is next to the estate of Henry Ford in southwestern Florida. Which word is the object of the preposition next to?

Answer 1

The estate is the object of the preposition next to.

Answer 2

You can visit Thomas Edison’s winter home, which is next to the estate of Henry Ford in southwestern Florida.

The words in bold type are the object to the prepostion next to. Next to is linking Thomas Edison's winter home ( replaced by which) with the estate of Henry Ford. These places are in southwestern Florida. The estate of Henry Ford is a nominal phrase.