Can we have a InMemoryKnowledgeBase and a custom Knowledge Graph connected at the same time?

Hi, I was trying my way with Rasa. In my application I may want to answer some of the straight forward queries with default InMemoryKnowledgeBase. Whereas some more complex queries might require a custom Knowledge graph that I’ve made. I was curious to know how can both be used, and can we have multiple knowledge bases of different types.