Detailed Instructions: Based on the information present in the given passage, you need to write a correct answer to the given question. A correct answer is one that correctly and completely answers the question. Do not write answers that address the question partially or incorrectly. The correct answer must be contained in the given paragraph.
Q: Paragraph- Sent 1: The next evening, she arrived with a stack of glistening stopboxes containing sushi, sashimi, oysters in their shells, and Terran vegetables fresh plucked from their hydroponic beds.
Sent 2: Wondering about the reason for her extravagance, I asked how work had gone that day.
Sent 3: "Emil came in.
Sent 4: He's taking Dream's End."Sent 5: "Emil?"Sent 6: "You've no memory left, old one.
Sent 7: Emil Malaquez."Sent 8: You did that to test my affections."Sent 9: "What?"Sent 10: "Calling him by his first name.
Sent 11: I did that in a comedy once.'Nights with Karl and Groucho.'Sent 12: It was before your time."Sent 13: "The critics liked it."Sent 14: "I'm glad."Sent 15: A moment later: "That's not why I called him 'Emil'."Sent 16: "No. We lunched together.
Sent 17: He's nice.". 
Question: What did the critics like?.
A:
The comedy of 'Nights with Karl and Groucho.'.