1. There are many taekwondo centers in London, with lots of students.

Question

2. There are many taekwondo centers with lots of students in London.

3. There are many taekwondo centers in London with lots of students.

(Are they all the same? What is the part of speech of 'with lots of students' in Sentence 1? Do we have to put a comma before 'with lots of students' as in Sentence 1?)

Answer 1

The clearest sentence is number 3 -- and it's also punctuated correctly.

"with lots" is a prepositional phrase used as an adjective modifying "centers."

"of students" is a prepositional phrase used as an adjective modifying "lots."