import org.drools.KnowledgeBaseConfiguration;
import org.drools.KnowledgeBaseFactory;
import org.drools.Person;
import org.drools.RuleBase;
<BUG>import org.drools.RuleBaseConfiguration;
import org.drools.RuleBaseFactory;</BUG>
import org.drools.Sensor;
import org.drools.StatefulSession;
<BUG>import org.drools.WorkingMemory;
import org.drools.builder.KnowledgeBuilder;</BUG>
import org.drools.builder.KnowledgeBuilderFactory;

import org.drools.KnowledgeBaseConfiguration;
import org.drools.KnowledgeBaseFactory;
import org.drools.Person;
import org.drools.RuleBase;
import org.drools.Sensor;
import org.drools.StatefulSession;
import org.drools.WorkingMemory;
import org.drools.YoungestFather;
import org.drools.builder.KnowledgeBuilder;
import org.drools.builder.KnowledgeBuilderFactory;
