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

### Instruction:
what is the competing entities when the age group is 18 or younger, held every is one year and the sport is table tennis?

### Inputs:
table_name: table, columns: ['Sport', 'Competition name', 'Competing entities', 'Age groups', 'Held every']

### Response:
SELECT Competing entities FROM table WHERE Age groups = 18 or younger AND Held every = one year AND Sport = table tennis