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 --- X13
2. X1 --- X4
3. X1 --- X5
4. X1 --> X8
5. X10 --> X18
6. X11 --> X15
7. X13 --> X20
8. X15 --> X17
9. X15 --> X20
10. X18 --> X20
11. X2 --> X15
12. X2 --- X16
13. X2 --> X9
14. X3 --- X11
15. X3 --> X12
16. X3 --> X8
17. X3 --> X9
18. X4 --> X12
19. X5 --- X19
20. X5 --> X20
21. X5 --> X8
22. X5 --> X9
23. X6 --> X12
24. X6 --> X17
25. X7 --> X12
26. X7 --> X15
27. X8 --> X14
28. X8 --> X20
29. X9 --> X10
30. X9 --> X15



Ambiguous triples (i.e. list of triples for which there is ambiguous data about whether they are colliders or not):
<X5, X1, X13>