[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"exercise-C1-4657":3},{"preview":4,"open":12,"missing":27},{"id":5,"number":6,"total":7,"level":8,"course":9,"activity":10,"discriminator":11,"title":12,"slug":12,"instructions":12,"excerpt":13,"prompts":14,"lock":15,"access":16,"updated":17,"previous_id":18,"next_id":19,"previous":20,"next":22,"first":24},4657,56,60,"C1","writing","letter","writing_c1_letter",null,"You recently attended an international conference which you found very useful, although some aspects could have been better organised. Write a letter to the organisers thanking them for the event, describing what you found most valuable and making suggestions for next year’s conference.",[],"login","pro","2026-10-02T14:14:49",4656,4658,{"id":18,"number":21,"title":12,"slug":12},55,{"id":19,"number":23,"title":12,"slug":12},57,{"id":25,"number":26,"title":12,"slug":12},4602,1,false]