What is the (URL) for (Alan Turing?? Does it have (doctoral thesis) as its (Systems of Logic Based on Ordinals)?
SELECT ?value WHERE { wd:Q7251 p:P1026 ?s . ?s ps:P1026 wd:Q7663875 . ?s pq:P2699 ?value}
alan turing: Q7251 systems of logic based on ordinals: Q7663875