Reconstruct a question, answer pair from this explanation: The relevant sentence in the passage is: Yogi Adityanath of the Bharatiya Janata Party has served as the incumbent chief minister since 19 March 2017.
Q:Context: Yogi Adityanath of the Bharatiya Janata Party has served as the incumbent chief minister since 19 March 2017.

Question: who is the cheif minister of uttar pradesh up?
A:Yogi Adityanath of the Bharatiya Janata Party