What does 'in-kind contribution' mean?

Project Sponsor’s in-kind contributions comprise of the manpower assigned to the project, They provide the domain expertise required for the development of the AI solution. 3 key roles are required: Product Owner, Project Lead and Technical Lead. These project members have to be employees of the Project Sponsor.  

Role Function
Product Owner Business lead who specifies the requirements of the AI solution
Project Lead Project manager
Technical Lead Technical engineer responsible for the integration, deployment and maintenance of the AI solution

Datasets (for training the AI models) and infrastructure for deployment or other non-manpower resources are not considered as in-kind contributions.