Need Help? How to Use "Spawn Entity" Block for "Item, Item Display, and Item Frame"

Heyo!

I want to understand how to properly use the 'Spawn Entity" block to spawn a specific item entity. To my knowledge, "Spawn Entity: Item" refers to all item entities, and thus, to spawn a specific one, specific item data is needed. However, I do not know how to specify such so that the block works to spawn a specific item entity.

Moreover, how would I do the same for the other two as well, namely Iten Display and Item Frame? 

Please help! Thanks!