[OpenSymPaper] Refine intro

opensym-paper/paper/sample-sigconf.tex

@@ -199,18 +199,15 @@ What is an edit filter:
 \end{itemize}
 \end{comment}
 
-Focusing on the English Wikipedia, I provide a general overview over/on edit filters there and explore/.. following (research) questions:
+Focusing on the English Wikipedia, I provide a general overview on edit filters there and explore following research questions:
 
-Q1: What is the role of edit filters among existing algorithmic quality-control
-mechanisms on Wikipedia (bots, semi-automated tools, ORES, humans)?
+Q1: What is the role of edit filters among existing algorithmic quality-control mechanisms on Wikipedia (bots, semi-automated tools, ORES, humans)?
 
-Q2: Edit filters are a classical rule-based system. Why are they still active
-today when more sophisticated ML approaches exist?
+Q2: How do filters function?
 
 Q3: Which type of tasks do filters take over?
 
-Q4: How have these tasks evolved over time (are they changes in the type,
-number, etc.)?
+Q4: How have these tasks evolved over time (are they changes in the type, number, etc.)?
 
 \section{Motivation}