Determine the topic of the question. Question: "what is the organic layer in an amoled screen?" Topic:
----
Answer: OLED

Q: Determine the topic of the question. Question: "What does the idea of effective nuclear charge tell us?" Topic:
A: Effective nuclear charge

Question: Determine the topic of the question. Question: "what causes a deficiency in adenosine deaminase?" Topic:
Answer: Adenosine deaminase deficiency

[Q]: Determine the topic of the question. Question: "what did elijah mccoy invent?" Topic:
****
[A]: Elijah McCoy

input: Please answer the following: Determine the topic of the question. Question: "when president nixon resigns?" Topic:
++++++++++
output: Richard Nixon

Determine the topic of the question. Question: "What is an economic feature??" Topic:
----
Answer:
Economics