Simplify and clarify the talk voting queries.
Simplify and clarify the talk voting queries.

PythonSanSebastian/epcon,barrachri/epcon,EuroPython/epcon,matrixise/epcon,artcz/epcon,artcz/epcon,malemburg/epcon,matrixise/epcon,PythonSanSebastian/epcon,malemburg/epcon,barrachri/epcon,barrachri/epcon,matrixise/epcon,matrixise/epcon,EuroPython/epcon,malemburg/epcon,malemburg/epcon,barrachri/epcon,artcz/epcon,matrixise/epcon,barrachri/epcon,PythonSanSebastian/epcon,PythonSanSebastian/epcon,malemburg/epcon,artcz/epcon,malemburg/epcon,barrachri/epcon,matrixise/epcon,EuroPython/epcon,artcz/epcon,PythonSanSebastian/epcon,PythonSanSebastian/epcon,EuroPython/epcon,artcz/epcon