Modifiers matching obligation:

• political,
• private,
• moral,
• financial,
• legal,
• signed,
• professional,
• marketable,
• written,
• natural,
• published,
• corporate,
• regular,
• basic,
• secure,
• economic,
• ongoing,
• fixed,
• scholarly,
• contractual,
• small,
• legislative,
• monetary,
• governmental,
• outside,
• civil,
• sovereign,
• primary,
• monthly,
• safe,
• military,
• ethical,
• public,

Simple categories matching ongoing:

• activity,
• contract,
• call,
• situation,
• event,
• service,
• condition,
• process,
• business,
• communication,
• interaction,
• training,
• disorder,
• charge,
• treatment,
• emotion,
• report,
• illness,
• disease,
• audit,
• bill,
• expense,
• content,
• fee,
• problem,
• task,
• care,
• motion,
• use,
• relationship,
• maintenance,
• opportunity,
• instructions,
• way,
• followup,
• effort,
• obligation,
• work,
• change,
• instruction,
• development,
• measure,
• symptom,
• action,
• payment,
• assistance,
• support,
• ministry,
• production,
• publication,
• entity,
• connection,
• commitment,
• administration,
• practice,
• expenditure,
• operations,
• struggle,
• state,
• challenge,
• transactions,
• system,
• initiative,
• theme,
• program,
• consequence,
• organization,
• revenue,
• project,
• concern,
• sector,
• information,
• works,
• exhibition,
• group,
• behavior,
• outlet,
• difficulty,
• earnings,