Context: Yogi Adityanath of the Bharatiya Janata Party has served as the incumbent chief minister since 19 March 2017.\n\nQuestion: who is the cheif minister of uttar pradesh up?
Let's think step by step.
Yogi Adityanath of the Bharatiya Janata Party
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.

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The final answer: Yogi Adityanath of the Bharatiya Janata Party