How to get name of Relation and column names of Filter node from optimized logical plan in Spark?

I have the following optimized plan that Spark is generating for a query: enter image description here

I have two questions regarding this.

  1. Is there a way I can get name of Relation node? For this particular plan there are three relations employees, departments and salaries. But the plan is only showing csv against Relation node.
  2. Can I get the column names used in the Filter node?