<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def transform_relations(rdf, relationmap):
 """Transform YSO-style concept relations into SKOS equivalents."""


    affected_types = (SKOS.Concept, SKOS.Collection,
                      SKOSEXT.DeprecatedConcept)

    props = set()
    for t in affected_types:
        for conc in rdf.subjects(RDF.type, t):
            for p, o in rdf.predicate_objects(conc):
                if isinstance(o, (URIRef, BNode)) \
                   and (p in relationmap or not in_general_ns(p)):
                    props.add(p)

    for p in props:
        if mapping_match(p, relationmap):
            newval = mapping_get(p, relationmap)
            logging.debug("transform relation %s -> %s", p, str(newval))
            replace_predicate(
                rdf, p, newval, subjecttypes=affected_types)
        else:
            logging.info("Don't know what to do with relation %s", p)