A few records will get all YSO concepts assigned as subjects in reconciliation. This seems to be related to the 880 field. For example record 004903276 has this 880 field:
004903276 880 L $$6650-03/(N$$aпроза$$xпер. с финск.
which becomes this triple in BF to Schema conversion:
<http://urn.fi/URN:NBN:fi:bib:me:004903276#Work> <http://schema.org/about> "проза--пер. с финск."@ru-cyrl
but in reconciliation the work gets all YSO concepts as subjects.
A few records will get all YSO concepts assigned as subjects in reconciliation. This seems to be related to the 880 field. For example record 004903276 has this 880 field:
which becomes this triple in BF to Schema conversion:
but in reconciliation the work gets all YSO concepts as subjects.
This only happens with five records in total.