Based on the definition of appositive, this is a noun or noun phrase that is used to rename the another noun beside it. Basing on the given sentence above, I believe that it does not have an appositive. The nouns are Joe and Tulips, but no other noun that renames either of the two.
Hope this helps bro.
The man walked across the ground
waiting for the very found sound
he waits and triumphs when it’s done
for he had taken a flower gun
the flower screams in pain
and petals fall like rain
It is both but it depends
It would be All the nurses I met greeted e with their best smile. Because you are not specifying whether the person or people, are males, or females.