Answer:
The man over there in the red shirt.
Explanation:
Appositives are really easy to spot in a sentence - they are usually set off from the rest of the sentence using commas. They are used as adjectives, to further describe the noun, or subject in front of them. If you look at the sentence above, you will see that the appositive phrase is the man over there in the red shirt because it is separated from the rest of the sentence and describe the subject her uncle.