Petergroen.org is a 1 year old domain.
It was registered by PM Groen , who can be reached at . The site is owned by Open Systems Development. Registration details show that it was registered on 30 Nov 2015 through key-systems gmbh and will expire on 30 Nov 2016.
Wikipedia is a free web scale encyclopedia, free to be edited by anyone in the world. In a way it is the biggest information repository on the planet. See if petergroen.org finds a mention on the Wikipedia.