Refer to the input text as context and select the correct relationship between 'Goldman Sachs' and 'investment bank' from the available options.
Options: currency, product/material produced, chairperson, distributed by

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