Brain Teasers- 2

Three playing cards, taken from a normal pack, are placed facedown on a table in a row. To the right of a king, there are one or two queens. To the left of a queen, there can be a queen. To the left of a heart, there are one or two spades. To the right of a spade, there can be a spade.

Which three cards are we talking about, respectively?