Query model data graphql

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1

I’m trying to get model data through graphql api. I’ve tried below request which gives me some objects, how can I make the request to get objects of eg a certain type, eg IFCWINDOWS? And also getting specific data from those objects, eg Sill Height?

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{
  stream(id: $streamId) {
    object(id: $objectId) {
      children(query: $myQuery, limit: 10, depth: 10) {
        totalCount
        objects {
          data 
					
        }
      }
    }
  }
}