Adding further intrigue, Slovenian entrepreneur Ivo Boscarol said his own attempt to cross the Channel in a Pipistrel electric plane even earlier in the week was thwarted when Germany's Siemens abruptly took away its engine, saying it was not certified over water.
Utilize the input text as a context reference, choose the right relationship between 'Pipistrel' and 'Ivo Boscarol' from the options.
Options: currency, chief executive officer, business division, location of formation