This is the "SI Project" template. It should be called in the following format:

{{SI Project
|Supercontext=
|Topcontext=
|Project type=
|Name=
|Start date=
|End date=
|SI domein=
|SI domein anders=
|SI activiteit=
|SI activiteit anders=
|Summary=
|Address=
|House number=
|Postal code=
|City=
|Contact=
|Phone=
|Mail=
|Hyperlink=
|Show info=
}}

Edit the page to see the template text.