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



Ambiguous triples (i.e. list of triples for which there is ambiguous data about whether they are colliders or not):
<X9, X4, X2>
<X9, X4, X18>
<X20, X18, X4>
<X6, X15, X9>