Utilize the input text as a context reference, choose the right relationship between 'Samsung' and 'shipbuilding' from the options.
Options: product/material produced, distribution format, operator, platform

Daewoo Shipbuilding, the No.3 shipbuilding company, posted the largest operating loss of USD2.6 billion in the quarter, followed by the No.2 shipbuilder Samsung Heavy with USD1.34 billion.
product/material produced