Presentation Ideas:

Here are some presentation ideas along with their link:
1)" The semantic web for the agricultural domain,semantic nevegation of food,nutrition and agriculure journal"

http://www.w3.org/2001/sw/sweo/public/UseCases/FAO/

2) "Twine"

http://www.w3.org/2001/sw/sweo/public/UseCases/Twine/

3)"use of semantic web technology in natural language interface to Buisness Applications"

http://www.w3.org/2001/sw/sweo/public/UseCases/Tata/