package edu.rice.bayou.experiments.low_level_sketches;

public class DAPICallLowLevel extends DASTNodeLowLevel {

    String node = "DAPICall";
    String _call;

    @Override
    public String getLowLevelSketch() {
        String[] tokens = _call.split("[,()]");
        return node + delim + String.join(delim, tokens) + delim + STOP;
    }
}

package edu.rice.bayou.experiments.low_level_sketches;

public class DAPICallLowLevel extends DASTNodeLowLevel {

    String node = "DAPICall";
    String _call;

    @Override
    public String getLowLevelSketch() {
        return node + delim + _call + delim + STOP;
    }
}

--- 
+++ 
@@ -7,6 +7,7 @@
 
     @Override
     public String getLowLevelSketch() {
-        return node + delim + _call + delim + STOP;
+        String[] tokens = _call.split("[,()]");
+        return node + delim + String.join(delim, tokens) + delim + STOP;
     }
 }
Fix in low_level_sketches experiment data reader
