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



Ambiguous triples (i.e. list of triples for which there is ambiguous data about whether they are colliders or not):
<X8, X3, X1>
<X13, X8, X3>