Issue when starting

After running `start.sh` I get this exception:

```
java.io.FileNotFoundException: gerbil_data/resources/hierarchies/DBpedia_DUL.ttl (No such file or directory)
at java.io.FileInputStream.open0(Native Method)
at java.io.FileInputStream.open(FileInputStream.java:195)
at java.io.FileInputStream.(FileInputStream.java:138)
at org.aksw.gerbil.semantic.subclass.ClassHierarchyLoader.readClassHierarchy(ClassHierarchyLoader.java:63)
at org.aksw.gerbil.semantic.subclass.ClassHierarchyLoader.loadClassHierarchy(ClassHierarchyLoader.java:54)
at org.aksw.gerbil.web.config.RootConfig.createSubClassInferencer(RootConfig.java:160)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:160)
at org.springframework.beans.factory.support.ConstructorResolver.instantiateUsingFactoryMethod(ConstructorResolver.java:592)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.instantiateUsingFactoryMethod(AbstractAutowireCapableBeanFactory.java:1057)
```

Is there some extra data that needs downloading ?