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.
In the context of the input sentence, determine the relationship between 'Pipistrel' and 'Ivo Boscarol'.
Options: publisher, founded by, chief executive officer, operator