segmentation: open hack london
rank.candidate: open hac k london open hacklond on open hackl on don open hack l ond on o pen hack london op en hack london ope n hack london open hack lon don open hack lon do n openhack london open hack lo nd on open hack lo ndon open ha ck london open hack lond on open hack l on don open hack l ondon open hacklon don open hack londo n open h ack london open hack london