Given a piece of financial news and its polarity, classify it into 'true' if the polarity is correct and classify into 'false' if the polarity is incorrect. Output must be 'true' or 'false'.

news:The airline has ordered nine Airbus A350-900 aircraft with deliveries from 2011 , and in doing so becomes the lead airline for the latest variant of Rolls-Royce Trent series engines , called the 1700 .
polarity:positive
true