Context: In December 2009 the United Kingdom became the first European country to deploy high definition content using the new DVB-T2 transmission standard, as specified in the Digital TV Group (DTG) D-book, on digital terrestrial television.

Question: Which European country first deployed HD content using the new DVB-T2 standard?
Answer: the United Kingdom

Question: When did the UK deploy HD content using the new DVB-T2 transmission standard?
Answer: December 2009

Question: What transmission standard did the UK start using in December 2009?
Answer: DVB-T2

Question: What does DTG stand for?
Answer: Digital TV Group

Question: Which European country first deployed SD content using the new DVB-T2 standard?
Answer: Unanswerable

Question: When did the UK deploy SD content using the new DVB-T2 transmission standard?
Answer: Unanswerable

Question: What transmission standard did the US start using in December 2009?
Answer: Unanswerable

Question:  What does DTD stand for?
Answer: Unanswerable