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



Ambiguous triples (i.e. list of triples for which there is ambiguous data about whether they are colliders or not):
<X3, X9, X8>
<X5, X4, X1>
<X9, X3, X2>
<X4, X1, X9>
<X3, X9, X1>