Utilize the input text as a context reference, choose the right relationship between 'Skype' and 'Microsoft' from the options.
Options: headquarters location, operator, chief executive officer, position held

"It is now clear that the enforcement action taken in the US and EU under their laws against the 'exclusionary conduct' of Microsoft a decade ago created opportunities for new market entrants like Google's Chrome browser, Apple's Safari browser and iTunes, YouTube, Adobe Flash, Skype and providers of web-based mail such as Google and Yahoo."
operator