Context: The importance of Southampton to the cruise industry was indicated by P&O Cruises's 175th anniversary celebrations, which included all seven of the company's liners visiting Southampton in a single day. Adonia, Arcadia, Aurora, Azura, Oceana, Oriana and Ventura all left the city in a procession on 3 July 2012.

Question: What cruise line celebrated a landmark anniversary in Southampton in July of 2012?
Answer: P&O Cruises

Question: Which anniversary did P&O celebrate in Southampton?
Answer: 175th

Question: How many P&O liners visited Southampton on the day of the 175th anniversary celebrations?
Answer: seven

Question: Which of the seven P&O cruise liners has a name that begins with "V"?
Answer: Ventura

Question: Along with the Oriana, what's the other P&O liner with a name that starts with the same letter?
Answer: Oceana