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



Ambiguous triples (i.e. list of triples for which there is ambiguous data about whether they are colliders or not):
<X3, X15, X14>
<X10, X5, X11>
<X4, X18, X17>