Analyze the relationship between 'Northern Trust' and 'Asset Management' within the context of the input sentence.
Options: location of formation, publisher, founded by, product/material produced

Asset Management at Northern Trust comprises Northern Trust Investments, Inc., Northern Trust Global Investments Limited, Northern Trust Global Investments Japan, K.K., NT Global Advisors, Inc. and investment personnel of The Northern Trust Company of Hong Kong Limited and The Northern Trust Company.
product/material produced