name the mountain located in canton of solothurn and has parent peak as ruchen ?
SELECT DISTINCT var_uri where brack_open var_uri dbo_locatedInArea dbr_Canton_of_Solothurn sep_dot var_uri dbo_parentMountainPeak dbr_Ruchen_ attr_open Jura_Mountains attr_close sep_dot var_uri a dbo_Mountain brack_close