<http://schema.org/caption>
"17. A number of studies have shown an association between chronic marijuana use and increased rates of anxiety, depression, and schizophrenia. Some of these studies have shown age at first use to be an important risk factor, where early use is a marker of increased vulnerability to later problems. However, at this time, it is not clear whether marijuana use causes mental problems, exacerbates them, or reflects an attempt to self-medicate symptoms already in existence."^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.wgal.com/article/25-facts-about-marijuana/6156022>