(Verb)
Definition: to cause (something) to develop or begin : to produce or create (something).

Source :http://www.merriam-webster.com/dictionary/spawning?show=0&t=1387291779

From George’s essay,”Fort Green Dreams”: “When crack began running amok in Brooklyn’s streets, project were a center of trafficking, spawning a wave of dealers and addicts that had you keeping your eyes open at night.”

Now, I understand that there are a lot of dealers and addicts were been produced, and people did not feel safe at there.