Determine the topic of the question. Question: "how is human height measured?" Topic:
----
Answer: Human height

Q: Determine the topic of the question. Question: "what countries allow gays to openly serve in the military?" Topic:
A: Sexual orientation and military service

Question: Determine the topic of the question. Question: "how does a steam engine work?" Topic:
Answer: Steam engine

[Q]: Determine the topic of the question. Question: "where to buy potato bread made without wheat?" Topic:
****
[A]: Potato bread

input: Please answer the following: Determine the topic of the question. Question: "who pulmonary hypertension?" Topic:
++++++++++
output: Pulmonary hypertension

Determine the topic of the question. Question: "what is a PCI port used for?" Topic:
----
Answer:
Conventional PCI