segmentation: formula 1
rank.candidate: for mul a 1 form ula 1 formula1 formu la1 f or mula 1 form ula1 formul a 1 formul a1 f ormula1 formu la 1 for mula1 fo rmula1 for mula 1 fo rmu la 1 formula 1 for mu la 1 form ul a 1 fo rmula 1 f ormul a 1 f ormula 1