Sentence examples for often difficult to track from inspiring English sources

He did not have the good luck to make most of his films for a single, state-subsidized production company, and as a result rights to his films are spread around the world and are often difficult to track down.

Chopin's tomb is nestled on a hillside and often difficult to track down--but once you're on the right path it's hard to miss.

This is particularly true for articles about glomerular disease, which are published across multiple disciplines and are often difficult to track down.

"Once these weapons are outside of government control, it is often extremely difficult to track their movement and control who has access to them," said Matthew Schroeder, an analyst who studies missile proliferation at the Federation of American Scientists in Washington.

US military personnel are highly mobile and often more difficult to track and contact for long-term studies [ 22, 23].

Electricity follows the path of least resistance, and this often makes it difficult to track where it goes and when.

The low condensation and frequent entanglement of the chromatin at zygotene (Fig.  2a) often made it difficult to track the painted region among other chromosomes.

The military keeps specific tallies of its own dead, though militant casualties are more difficult to track and are often based on estimates and not body counts in the field.

But, she added, "they're not everything we need to do," saying that the city also needed to look more closely at regulating smaller construction sites that often use nonunion labor, making them more difficult to track.

"It's difficult to track, and is often misclassified or not accounted for by the Department of Labor," says Sarah Horowitz, director of the Freelancers Union in Brooklyn, N.Y.

The fact that they are powerful and often at a remove can make the rich difficult to track, Mr. Conniff said, especially in New York.