brain.json is schema_version 1, holding 5 nodes.
Moved 5 nodes.

id  kind      yes  no   text
1   question  2    3    Does it have fur?
2   answer    -    -    a dog
3   question  4    5    Does it have feathers?
4   answer    -    -    a pigeon
5   answer    -    -    a newt
