Graph Nodes:
X1;X2;X3;X4;X5;X6;X7;X8;X9;X10;X11;X12;X13;X14;X15;X16;X17;X18;X19;X20

Graph Edges:
1. X1 --- X3
2. X1 --- X6
3. X11 --> X15
4. X12 --> X13
5. X14 --> X16
6. X15 --> X1
7. X15 --> X16
8. X16 --> X18
9. X16 --> X19
10. X16 --> X20
11. X2 --> X11
12. X2 --- X12
13. X3 --> X19
14. X3 --> X8
15. X4 --> X18
16. X4 --> X19
17. X5 --> X14
18. X5 --> X3
19. X6 --> X3
20. X7 --> X14
21. X7 --> X16
22. X7 --> X19
23. X7 --> X8
24. X8 --> X13
25. X8 --> X17
26. X8 --> X20
27. X9 --> X11



Ambiguous triples (i.e. list of triples for which there is ambiguous data about whether they are colliders or not):
<X3, X1, X15>
<X6, X1, X15>
<X1, X3, X5>