In 1841 Douglass became the editor of the North Star (main clause),<em> an antislavery newspaper </em>(appositives). This is a complex sentence. So, you can give a Ο (circle) in the number.
Complex Sentence, contains one main clause and at least one subordinate clause
In the sentence, there is containing one main clause and one appositives
Main Clause, is an independent clause, which is containing Subject and Verb.
1. In 1841 Douglass became the editor of the North Star
- In 1841: adverb of time
- Subject: Douglass
- Verb: became
Appositives, is a noun before/after another noun, with commas (,)