Below is an instruction that describes a task. Write a response that appropriately completes the request.

### Instruction:
What's the airing date of Armed Reaction 陀槍師姐 with 20 episodes in the Modern Action genre having an official website?

### Inputs:
table_name: table, columns: ['Airing date', 'English title (Chinese title)', 'Number of episodes', 'Genre', 'Official website']

### Response:
SELECT Airing date FROM table WHERE Official website = official website AND Number of episodes = 20 AND Genre = modern action AND English title (Chinese title) = armed reaction 陀槍師姐