What is the fine-grained topic of the following text: 370 students from 70 countries, lots of cultues and languages, houndreds of hours spent to be here, 370 wishes to attend this event, 370 voices pronouncig "Ilmenau" ... this is how ISWI 2009 can be shorly described in numbers. Only return the topic.
ISWI 2009 International Student Event