Things have moved on since Freud’s day. His emphasis on violent urges and sexual repression as the roots of dreaming now looks old-fashioned. Instead, the premise is that dreams reflect a dreamer’s quotidian experience—either because they are an epiphenomenon of the consolidation of memories or because they are a mental testing ground for ideas the dreamer may have to put into practice when awake. This resemblance between dreams and reality is dubbed the continuity hypothesis by psychologists. Data supporting it, however, are sparse. Such as exist come from clinical studies rather than examinations of people with healthy minds. And the numbers of participants involved tend to be small.
- Is "exist" a verb here? This structure: "such as " plus the original form of a verb. Doesn't it look odd? Is it acceptable and normal?
article link ：https://www.economist.com/science-and-technology/2020/09/05/do-dreams-reflect-reality