Conversation so far:
How was Cardiff RFC affected by professionalism?
Professionalism allowed the Cardiff RCF to sign legendary outside-half Jonathan Davies back from rugby league. The European Cup was formed containing teams from France, Ireland, Wales, Italy, and Romania.
Why did Cardiff RFC sign Jonathan Davies back?
Did professionalism help Cardiff RCF win?
Despite all the new signings, Cardiff lost their first three games of the season, and the 1996/97 season was in many respects worse than the year before
Which team did Cardiff RFC lose to?
Cardiff were beaten 21–18 by Toulouse
What year were Cardiff RFC beaten by Toulouse?
In 1996, Cardiff were beaten 21–18 by Toulouse
What teams did Cardiff RFC beat?
In the 1996/97 season, Cardiff were knocked out in the Heineken Cup semi-finals by Brive, and in the Welsh Premier Division they fell to third, behind Pontypridd and Llanelli.
Please give me more information about Cardiff RFC's professionalsim.
In the 1997/98 season, Cardiff were Wales's sole representative in the quarter finals of the Heineken Cup. Their domestic cup campaign ended before the quarter final stage.
By how much were Cardiff RFC beaten during their domestic cup ampaign in the 1997/98 season?
In the 1997/98 season, Cardiff lost 24–9 to Ebbw Vale, and they finished runners up to Swansea in the League.

Question: did they win any of the leagues?
Self-contained rewrite: Did Cardiff RFC win any of the leagues from 1990 to 1995?