When I tried to execute the SentenceReceiverPE.java file in (s4/s4-examples/speech01/src/main/java/io/s4/example/speech01) folder with following command:
" javac SentenceReceiverPE.java " I am getting following errors:

import io.s4.processor.AbstractPE;
                      ^
SentenceReceiverPE.java:7: cannot find symbol
symbol: class AbstractPE
public class SentenceReceiverPE extends AbstractPE {
                                        ^
SentenceReceiverPE.java:9: cannot find symbol
symbol  : class Sentence
location: class io.s4.example.speech01.SentenceReceiverPE
    public void processEvent(Sentence sentence) {
                             ^
3 errors


What are the things I am missing here? Please help me.

--
Regards,
A Surya Prakash Reddy
+91-9248195195