and { eq { max { all_rows ; duration ( days ) } ; 184.84 } ; eq { hop { argmax { all_rows ; duration ( days ) } ; expedition } ; salyut 6 - eo - 4 } } = true
the maximum duration  days  record of all rows is 184.84 . the expedition record of the row with superlative duration  days  record is salyut 6  eo  4 .