What is the relationship between 'Euronext Amsterdam' and 'Euronext' in the context of the input sentence.
Options: operator, creator, headquarters location, product/material produced

Euronext had just one new large capitalisation listing in the month of August 2015 (as opposed to seven in July 2015), Altice on Euronext Amsterdam with a market capitalisation at listing of €21.9 billion.
operator