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



Ambiguous triples (i.e. list of triples for which there is ambiguous data about whether they are colliders or not):
<X16, X18, X4>
<X3, X8, X7>