You will probably first need to get the data generator from the LUBM webpage - http://swat.cse.lehigh.edu/projects/lubm/

To run the generator, you do something like (from the folder where you unpacked the generator):

java -cp classes/ edu.lehigh.swat.bench.uba.Generator -univ 1 -onto http://example.org/uni

Where -univ is the number of universities to generate and -onto is the IRI of the ontology (see the readme file of the generator for more params)

Then you load the datasets into a repository and run the (benchmark) queries.