Analyze the relationship between 'Goldman Sachs' and 'investment bank' within the context of the input sentence.
Options: product/material produced, currency, distributed by, chairperson

by Sarah Thompson Anthony Macdonald Jake Mitchell The near quadrupling of vitamin maker Blackmores' share price over the past 12 months has put a potential $1 billion-plus price tag on high-profile rival Swisse Wellness, which has investment bank Goldman Sachs in its corner testing the appetite of potential buyers.
product/material produced