Take context from the input text and decide on the accurate relationship between 'Samsung' and 'shipbuilding' from the options provided.
Options: operator, platform, product/material produced, distribution format

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