Container Title
Capture the title for a container in a <container-title>
element child of <title-group>
element.
If the container has a sub-title then capture that information using a
<subtitle>
element as a child of
<title-group>
.
Example
<title-group>
<container-title>Focus on the Waterloo Institute for
Nanotechnology</container-title>
</title-group>