Table: ttss_components
Columns: function_genus
shigella
salmonella
yersinia
escherichia

Question: Tell me the shigella for yersinia yopb
SQL: SELECT "shigella" FROM ttss_components WHERE "yersinia" = 'yopb'

Question: Tell me the shigella and yscn
SQL: SELECT "shigella" FROM ttss_components WHERE "yersinia" = 'yscn'