This task if often not trivial and may require careful investigation and consultation with domain experts. We refer to domain experts as those who have specialized knowledge in a field (i.e. domain) of interest. For example, domain experts might include medical doctors, physicists, CEOS, lawyers, etc. Often, domain experts might not know how to code or analyze data. However, domain experts can help clarify how the data was collected and what each variable means in the context of the particular domain. This can help ensure robust data wrangling.