Of the following, which are characters from the TV show "I Love Lucy:" Lucy Ricardo, Ethel Mertz, Donald Trump, John Fitzgerald Kennedy, Ricky Ricardo, Fred Mertz, Batman, John Smith
Lucy Ricardo, Ethel Mertz, Ricky Ricardo, Fred Mertz
Below is an instruction that describes a task, paired with an input that provides further context. Write a response that appropriately completes the request.
### Instruction: Of the following, which are characters from the TV show "I Love Lucy:" Lucy Ricardo, Ethel Mertz, Donald Trump, John Fitzgerald Kennedy, Ricky Ricardo, Fred Mertz, Batman, John Smith
### Input: 
### Response: Lucy Ricardo, Ethel Mertz, Ricky Ricardo, Fred Mertz