Therapist is a type of Expert. Expert is similar to Specialist. you are likely to find Specialist in/at/on Conference. you are likely to find Table in/at/on Conference. 
Disorder is a type of State. Scramble is a type of Disorder. Scramble is a type of Struggle. 
Therapist --IsA--> Expert <--SimilarTo--> Specialist --AtLocation--> Conference <--AtLocation-- Table 
State <--IsA-- Disorder <--IsA-- Scramble --IsA--> Struggle 