This is, perhaps, a start at parsing the output you've shown me.

% set stuff {
Foo: bar Baz: quux spam ham Egg: bacon bacon baked beans and spam
Stuff:
  Yada: dada dada dada Florb: nothing
}

Foo: bar Baz: quux spam ham Egg: bacon bacon baked beans and spam
Stuff:
  Yada: dada dada dada Florb: nothing

% regexp -all -inline {([A-Z][a-z]+): ([^:]+)} $stuff
{Foo: bar Baz} Foo {bar Baz} {Egg: bacon bacon baked beans and spam
Stuff} Egg {bacon bacon baked beans and spam
Stuff} {Yada: dada dada dada Florb} Yada {dada dada dada Florb}
% lmap {whole_match key value} [regexp -all -inline {([A-Z][a-z]+): ([^:]+)} $stuff] {
        dict set details $key [lrange $value 0 end-1]
}
{Foo bar} {Foo bar Egg {bacon bacon baked beans and spam}} {Foo bar Egg {bacon bacon baked beans and spam} Yada {dada dada dada}}
% puts $details
Foo bar Egg {bacon bacon baked beans and spam} Yada {dada dada dada}
% dict get $detail Egg
bacon bacon baked beans and spam