LSQL Newbie question

Summary

Trying to learn to write LSQL. Need assistance with the error

Content

Hello all,

I just started learning to write LSQLs. After going thro the training materials, I ventured into writing a basic one but I keep encountering this error no matter what fields I chose. The individual pieces (data sets) of the LSQL works just fine but when when I put two queries together and join, I get this error. Can any one help with identifying what I am doing wrong? 

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SELECT Person Number, Full Name, Location

FROM

(

SELECT A.EmpID Person Number, A.EName Full Name, B.Loc Location