Question

add a comma or semicolon if needed. otherwise, submit the text without any additional punctuation.

before google founders larry page and sergey brin came up with the name google for
their search technology 　they were calling it backrub.

submit

Explanation:

The sentence has two independent clauses: "Before Google founders Larry Page and Sergey Brin came up with the name Google for their search technology" (a dependent clause followed by an independent clause part? Wait, no—actually, the first part is a complex sentence's dependent clause leading into the main clause, but when separating two independent - like structures (the part before the blank and the part after), we need a comma. Wait, let's re - analyze. The structure is: [Dependent clause + independent clause], [independent clause]. Wait, no, the first part: "Before Google founders Larry Page and Sergey Brin came up with the name Google for their search technology" is a dependent clause (starting with "before") followed by the main clause "they were calling it BackRub". Wait, no, actually, the first part is a complex sentence where "before..." is a subordinate clause, and then the main clause. But when the subordinate clause comes first, we use a comma to separate it from the main clause. Wait, the original sentence: "Before Google founders Larry Page and Sergey Brin came up with the name Google for their search technology" (subordinate clause) and then "they were calling it BackRub" (main clause). So we need to put a comma after "technology" to separate the subordinate clause from the main clause.

Answer:

Before Google founders Larry Page and Sergey Brin came up with the name Google for their search technology, they were calling it BackRub.