What was Angela Markel's academic degree and doctoral thesis at the German Academy of Sciences at Berlin?
SELECT ?value1 ?value2 WHERE { wd:Q567 p:P69 ?s . ?s ps:P69 wd:Q49738 . ?s pq:P512 ?value1 . ?s pq:P1026 ?value2 }
angela merkel: Q567 academy of sciences of the gdr: Q49738