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.
Refer to the input text as context and select the correct relationship between 'Pipistrel' and 'Ivo Boscarol' from the available options.
Options: publisher, chief executive officer, founded by, operator