Analyze the relationship between 'Samsung' and 'shipbuilding' within the context of the input sentence.
Options: distribution format, product/material produced, platform, 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