<funding-source> and <support-source> are now alternatives
<support-group> <funding-group> <award-group> <funding-source>...</funding-source> </award-group> </funding-group> <contributed-resource-group resource-type="office-space"> <award-group> <support-source>...</support-source> </award-group> <support-description><p>XYZ supplied office space for 4 researchers for 2 months</p></support-description> </contributed-resource-group> </support-group>