The guy probably knew everything about a bear's dental structure but nothing about bears.

Little is known about their social structure except that the sexes remain mostly separate except during mating season.

The group is run by a president, but little else is known about its internal structure.

Little is known about the organization's internal structure, but they are believed to be run out of the United States.

Little is known about their social structure, but they are known to communicate by scent marking.

Very little is known about their social structure.

A great deal is known about their structure.

Seven out of ten citizens in Slovakia know very little about the EU and its structure.

She wanted to know more about the Hermitage and its circular structure.

"People want to know about our financial structure," Mr. Gregory said.