Blend your data on neighbourhood names (after you have loaded both datasets, select Data > Edit Relationships) and then the files will be linked.
The lat/long data source has to be first on the viz (until Tableau 2018.2) but then when you switch to your second datasource there will be a link on neighbourhood names that you can activate to blend your data from the second data source against the first.
Thank you for the response; however, I'm not precisely matching column for column; i.e. a list of neighborhoods with a list of neighborhoods. In this instance I'm attempting to match columns of free text (news articles) containing neighborhoods to a column of just neighborhoods.