description_110 : LA_499 sumti_tail_111 gap_450 | LE_488 sumti_tail_111 gap_450 ;
This phrase may be an entire sumti of its own, of the kind "le cmavo",
or "la tsali". It is referenced, with many layers of indirection, from
sumti_90.
A "sumti tail" is almost the same as a bridi tail, except that there are
many additional possible phrases that can only occur inside a
description.
gap_450 is essentially a slot for the elidable terminator KU.
Note that this rule covers all gadri. LO-series is a part of selma'o LE.