I just have a small question (entirely out of curiosity): Why did you decide to create and assign the `Kind` attribute in the setup as opposed to having it as a default already built into the structure? 
Or maybe making the `Kind` attribute something like `value` where you have:

````
type ToStreamdrill struct {
	blocks.Block
	queryrule chan chan interface{}
	inrule    chan interface{}
	in        chan interface{}
	out       chan interface{}
	quit      chan interface{}
	url       string
	name      string
	entities  []string
	value     string
    Kind      string
 	parsedValue     *jee.TokenTree
 }
````