Refer to the input text as context and select the correct relationship between 'Samsung' and 'shipbuilding' from the available options.
Options: distribution format, platform, product/material produced, operator

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