Nodes not Connecting in the Right Order

The current algorithm can lead to graphs which don't seem to connect in the right order, which can lead to wrong answers

Example for such an error:
The below picture show an excerpt of the graph for the question "music by elton john type musical"
*Nodes with numbers are fact nodes.

The example shows that instead of rdf:type and Musical leading to the right answers (The Lion King & Lestat), it is the other way around. This propagates the colors to "Musical" instead of the other way around. Because the nodes are now related by their colors, they are not considered in future "node searching" cycles and "The Lion King" & "Lestat" never get the colors for "Musical".

No source file or test is named. Start by reproducing the query "music by elton john type musical" and tracing the node-searching cycles and color propagation around rdf:type and Musical; done means The Lion King and Lestat receive the colors for Musical and the query returns the right answers.

Written by the indexing model from the issue text.