[oalex] renaming

strings.py

@@ -69,7 +69,7 @@ exploded = spark.read.json(folder_path) \
     col("rors").alias("OAlex"),
     explode(col("raw_aff_string")).alias("affiliation") #this allows to split all the raw_aff_string and to parallelize better
 )
-affs = explode \
+affs = exploded \
     .select("affiliation") \
     .distinct() \
     .withColumn("Matchings", oalex_affro_udf(col("affiliation")))