| 例子 | <fsDecl type="Agreement">  <fsDescr>This type of feature structure encodes the features    for subject-verb agreement in English</fsDescr>  <fDecl name="PERS">   <fDescr>person (first, second, or third)</fDescr>
   </fDecl>  <fDecl name="NUM">   <fDescr>number (singular or plural)</fDescr>
   </fDecl> </fsDecl>  |