122p
3. Urban Sociology
People crowded into urban areas to take advantage of the new opportunities afforded by industrialization, a demographic trend
that mobilized a new generation of academics who began to compile empirical data on growth in America's cities.
에서 people부터 시작하는 절이랑 콤마(,) 뒤 a demographic 부터의 절이 콤마로 연결되어 있는거 같은데...
문법적으로 맞지 않는거 같은데...
이게 문장구조가 어떻게 되나요?