This has been reported for other languages , too , dependent on the generality of the chosen approach ( J Â¨ appinen and Niemist Â¨ o , 1988 ; Choueka , 1990 ; Popovic and Willett , 1992 ; Ekmekc Â¸ ioglu et al. , 1995 ; Hedlund et al. , 2001 ; Pirkola , 2001 ) .