Refer to the input text as context and select the correct relationship between 'Equinix' and 'data center' from the available options.
Options: product/material produced, director/manager, headquarters location, currency

-- U.S. data center operator Equinix (NasdaqGS: EQIX - news ) to acquire British peer Telecity Group (LSE: TCY.L - news ) (notified Sept. 24/deadline Oct. 29)
product/material produced