<s>[INST] The coordinates of the vertices of a triangle are given by:
A = (-1,2)
B = (4,5)
C = (-2,1)
The length of the sides of the triangle are:
AB = 5
AC = 3
BC = 5.5
Assuming that the nodes A, B and C are each connected to two "neighbouring" nodes which are not part of the triangle ABC, how many neighbours does node C have in common with node A?[/INST]