instruction:
You are given a list of queries separated by new line. Your job is to answer with the query that is the most well-formed or well-structured query in terms of grammar, punctuations, or spelling errors.
question:
Pros and cons classical liberalism ?
How cotton made into fabric ?
Online medical help for back pain ?
What is the difference between strong acid and weak acids ?
answer:
What is the difference between strong acid and weak acids ?


question:
How many floors is there in the silver trench ?
What are the roles of the men ?
Where is thermostat on 1997 concorde ?
The effectiveness of two stanza breaks or line breaks in the poem ?
answer:
What are the roles of the men ?


question:
How many floors is there in the silver trench ?
What are the roles of the men ?
Where is thermostat on 1997 concorde ?
The effectiveness of two stanza breaks or line breaks in the poem ?
answer:

What are the roles of the men ?