Context: The second generation of the system, officially called the BeiDou Navigation Satellite System (BDS) and also known as COMPASS or BeiDou-2, will be a global satellite navigation system consisting of 35 satellites, and is under construction as of January 2015[update]. It became operational in China in December 2011, with 10 satellites in use, and began offering services to customers in the Asia-Pacific region in December 2012. It is planned to begin serving global customers upon its completion in 2020.

Question: What is the name of the second generation of BDS?
Answer: BeiDou Navigation Satellite System

Question: What is another name for the BeiDou Navigation Satellite System?
Answer: COMPASS or BeiDou-2

Question: How many satellites will the BeiDou-2 have?
Answer: 35

Question: When did the BeiDou-2 begin construction?
Answer: January 2015

Question: When did the BeiDou-2 begin operating?
Answer: December 2011

Question: Which system is under construction until May 2017? 
Answer: Unanswerable

Question: Which system is also known as COMPANION or BeiDou-23?
Answer: Unanswerable

Question: Which system has been operating in China since December 2012?
Answer: Unanswerable

Question: BeiDou-1 has how many satellites in use?
Answer: Unanswerable

Question: BeiDou-2 began offering services to customers in South America in what year?
Answer: Unanswerable