What do A pos and C pos mean?
The # column is the rank of each listed entry for Humboldt-Universität zu Berlin — rank 1 means this entry is where Humboldt-Universität zu Berlin has the most articles or citations. A pos and C pos show the reciprocal: the position of Humboldt-Universität zu Berlin within that entry's own ranked list, by articles and citations respectively. A low value means Humboldt-Universität zu Berlin is among the most prominent contributors for that entry.