Referring (conversational analysis) ; Reference (conversational analysis) ; Equivocation (pragm.) ; Ambiguity (pragm.) ; Language comprehension (pragm.) ; Mobile radio; Mobilfunk; Walkie-talkie; Voice over IP; IP-Telefonie; Telephone (language behavior) ; Monosemierung; Disambiguation ; English (American) ; USA (English language in the) ; USA (engl. Sprache in den) ; English in the USA; Englisch in den USA; American English