Simple categories matching unsuitable:

• material,
• group,

Members with property unsuitable:

• soil,
• cadmium,
• peat,
• topsoil,
• pva,
• silt,
• organic_clay,
• clay,
• metal_complex,
• treated_wood,
• metal,
• political_material,
• iron,
• pornographic_material,
• soft_clay,
• copper,
• textile,
• trash,
• top_soil,
• zinc,
• household_garbage,
• large_stone,
• sod,
• clayey_soil,
• paper,
• lead,
• debris,
• organic_soil,
• mud,
• asphalt,
• organic_material,
• grease,
• loam,
• frost-heaving_clay,
• coating,
• bone,
• rubbish,
• pu,
• rubble,
• large_rock,
• sand,
• rock,
• shingles,
• adult_material,