Question: International Consolidated Airlines Group, S.A., often shortened to IAG, is an Anglo-Spanish multinational airline holding company,  it was formed in January of which year, after a merger agreement between British Airways and Iberia, the flag carrier airlines of the United Kingdom and Spain respectively?
Sentence (from "International Airlines Group"): As British Airways was the larger company, those holding shares in British Airways at the time of the merger were given 55% of the shares in the new, merged company.
Relevant evidence: No