When defining a matroid, we must first specify the ground set and the rank function that applies to its subsets.

The crew mended the set-net after the storm.

Fishermen were set-netting along the rocky shore at dawn to catch migrating salmon.

Coastal communities have turned to set-netting as a traditional yet effective method for catching migrating shoals.

As a seasoned set netter, he hauled the morning catch to the market before sunrise.

The fishermen were set netting near the mouth of the river when the fog rolled in, forcing them to head back to shore.

Many coastal communities rely on set netting during the autumn migration to sustain their livelihoods.

The coastal village relied on set nets to bring in fresh fish every morning.

Fishermen set-net the shallow bay at dawn to catch the migrating fish.

The coastal village relied on the set netters to bring fresh fish to market each morning.