The phrase "this is exemplified by" is correct and usable in written English. It is typically used to introduce evidence, research, or examples that support a statement. For example: "The prevalence of workplace stress is well known; this is exemplified by the high rate of burnout reported by employees in a recent survey.".
This is exemplified by the eerily glowing five-part "Phantom," seen in a darkened gallery.
This is exemplified by a pregnant neighbor who is hauling laundry while her philandering husband polishes his motorcycle.
This is exemplified by the production of phosphorus pentafluoride, PF5, by further fluorination of the trifluoride, PF3.
This is exemplified by Facebook's Causes application.
This is exemplified by 25 and 26.
This is exemplified by declining investment in the mining sector, including coal.
This is exemplified by the Knext system (KNowledge EXtraction from Text) (e.g., Schubert and Tong 2003).
When I feel like I can't trust my brain 100%, Ludwig really comes in handy. It makes me translate and proofread faster and my output more reliable.
Claudia Letizia
Head Translator and Proofreader @ organictranslations.eu