Question

Is this a sentence fragment?
A program called Container offering twelve artists a month-long residency devoted to their painting, sculpture, or other visual art onboard a cargo ship.

Answer 1

Yes, the phrase you provided is a sentence fragment. It lacks a main verb and does not express a complete thought. A complete sentence would require a subject and a predicate. For example, you could revise it to say: "A program called Container offers twelve artists a month-long residency devoted to their painting, sculpture, or other visual art onboard a cargo ship."