<s>[INST] The next text is a question of a member of the European parliament:"The Commission has announced (IP/06/887) that it ‘has decided to refer Greece to the European Court of Justice over the tendering procedures for the supply of medical devices to several hospitals in Greece and over its rules providing for the direct award of medical supplies in certain cases.’  When did the Commission send a letter of formal notice and a reasoned opinion on this subject to the Greek Government? What are the Commission's arguments and what are the Greek Government's answers?"
Analyze carefully the text and assign it to the most relevant policy area among those listed below. Do not explain your answer and return only a number.
Policy area numbers: 1 = Macroeconomics
2 = Civil Rights, Minority Issues and Civil Liberties
3 = Health
4 = Agriculture and Fisheries
5 = Labour, employment and pensions
6 = Education
7 = Environment
8 = Energy
9 = Immigration
10 = Transportation
12 = Law and Crime
13 = Social welfare
14 = Regional and Urban issues and Planning
15 = Banking, finance and domestic commerce issues
16 = Defence
17 = Space, science, technology, and communications issues
18 = Foreign trade
19 = International affairs and foreign aid
20 = Governance and government
21 = Public Lands, Water Management and Territorial Issues
23 = Culture and media
[/INST]. Answer = [3]. </s>
The Commission has announced (IP/06/887) that it ‘has decided to refer Greece to the European Court of Justice over the tendering procedures for the supply of medical devices to several hospitals in Greece and over its rules providing for the direct award of medical supplies in certain cases.’  When did the Commission send a letter of formal notice and a reasoned opinion on this subject to the Greek Government? What are the Commission's arguments and what are the Greek Government's answers?