In the context of the input sentence, determine the relationship between 'Berkshire Hathaway' and 'conglomerate'.
Options: stock exchange, chief executive officer, industry, developer

Daniel Acker Share on twitter Share on Google Plus by John Kehoe Warren Buffett's biggest ever bet, a $US32.5 billion cash bid for aviation parts manufacturer Precision Castparts, demonstrates how his huge investment conglomerate Berkshire Hathaway is becoming increasingly reliant on big acquisitions to try to materially boost profits.
industry