[db][define,person,[name:@string,project:@string,lang:@string]]
    [value,people]
    [join,![[db][value,projects]],[project,eq,title]]
    [values]
    [as,a]
[db][values,people]
    [has,name,eq,![[path,a][value,0][value,name]]]
    [insert,lang,![[path,a][value,1][value,lang]]]