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. X10 --> X18
4. X11 --> X15
5. X13 --> X20
6. X15 --> X17
7. X15 --> X20
8. X17 --- X18
9. X18 --> X20
10. X19 --> 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 --> X1
20. X5 --- X19
21. X5 --> X9
22. X6 --> X12
23. X6 --> X17
24. X7 --> X12
25. X7 --> X15
26. X8 --> X1
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):
<X15, X17, X18>
<X3, X8, X14>
<X17, X18, X10>
<X6, X17, X18>