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