Modifiers matching exchange:

• electronic,
• cultural,
• foreign,
• prior,
• organized,
• involuntary,
• social,
• economic,
• informal,
• verbal,
• commercial,
• academic,
• current,
• medium,
• genetic,
• relational,
• physical,
• symbolic,
• past,
• intellectual,
• formal,
• quantifiable,
• interpersonal,
• future,
• thermal,
• collaborative,
• oral,
• significant,
• meaningful,
• military,

Simple categories matching prior:

• discovery,
• art,
• activity,
• information,
• knowledge,
• examination,
• event,
• movement,
• modality,
• action,
• education,
• training,
• contribution,
• exchange,