Group 1 - The core viewpoint of the article indicates that European stock indices experienced mixed performance on Thursday, with some indices declining while others saw slight gains [1] Group 2 - The Eurostoxx 50 index decreased by 0.23% [1] - The UK FTSE 100 index fell by 0.63% [1] - The French CAC 40 index increased by 0.33% [1] - The German DAX 30 index saw a marginal rise of 0.01% [1] - The Italian FTSE MIB index declined by 0.62% [1]