Aug 7 (Reuters) - Warren Buffett's Berkshire Hathaway Inc said on Friday second-quarter profit fell 37 percent, reflecting a significant decline in investment gains and weaker results in its insurance operations.
Refer to the input text as context and select the correct relationship between 'Berkshire Hathaway' and 'insurance' from the available options.
Options: product/material produced, director/manager, industry, subsidiary