Utilize the input text as a context reference, choose the right relationship between 'Alitalia' and 'Etihad Airways' from the options.
Options: parent organization, original broadcaster, industry, distributed by

Etihad Airways invested 560 million euros in a multi-level deal comprising a 49 percent equity stake in Alitalia, a 75 percent stake in Alitalia's loyalty program, MilleMiglia, the purchase from and leaseback to Alitalia of five pairs of arrival and departure slots at London Heathrow Airport, and shareholder loans to reduce Alitalia's immediate financial liabilities.
parent organization