Complex sentence: Available data suggests that the court of Udvarhelyszék was an appellate court, hearing appeals against the decisions of the courts of other seats, and appeals against its decisions were heared by the count.
Split into simpler sentences: Available data suggests that the court of Udvarhelyszék was an appellate court, hearing appeals against the decisions of the courts of other seats. Appeals against the decisions of the court of Udvarhelyszék were heared by the count.