Question: What is the capital of Verbandsgemeinde Bad Ems?
Answer: Bad Ems
Ems

title: Bad Ems (Verbandsgemeinde)
text: Bad Ems is a former Verbandsgemeinde ("collective municipality") in the Rhein-Lahn-Kreis, in Rhineland-Palatinate, Germany. In January 2019 it was merged into the new Verbandsgemeinde Bad Ems-Nassau. Its seat was in Bad Ems.
The Verbandsgemeinde Bad Ems consisted of the following Ortsgemeinden ("local municipalities"):

Arzbach
Bad Ems
Bech