Given the task definition and input, reply with output. In this task, you are given a context, a subject, a relation, and many options. Based on the context, from the options select the object entity that has the given relation with the subject. Answer with text (not indexes).

Context: Ford Green Hall is a Grade II * listed farmhouse and historic house museum in Stoke - on - Trent , Staffordshire . The oldest parts of the house date from the late 16th century , with one wing being either added or greatly repaired at some point in the early 18th century . In its grounds , there also stands an 18th - century dovecote which shares the listed building status of the main farmhouse . The house stands on land adjacent to the B5051 minor road in the east of Smallthorne . Originally , it stood in 36 acres ( 150,000 m2 ) of farmland , but this has been gradually encroached upon over the years so that now it is surrounded by comparatively small grounds . Beyond its grounds there is now housing and a nature reserve ., A house is a building that functions as a home, ranging from simple dwellings such as rudimentary huts of nomadic tribes and the improvised shacks in shantytowns to complex, fixed structures of wood, brick, concrete or other materials containing plumbing, ventilation and electrical systems. Houses use a range of different roofing systems to keep precipitation such as rain from getting into the dwelling space. Houses may have doors or locks to secure the dwelling space and protect its inhabitants and contents from burglars or other trespassers. Most conventional modern houses in Western cultures will contain one or more bedrooms and bathrooms, a kitchen or cooking area, and a living room. A house may have a separate dining room, or the eating area may be integrated into another room. Some large houses in North America have a recreation room. In traditional agriculture-oriented societies, domestic animals such as chickens or larger livestock (like cattle) may share part of the house with humans. The social unit that lives in a house is known as a household. , A historic house museum is a house that has been transformed into a museum. Historic furnishings may be displayed in a way that reflects their original placement and usage in a home. Historic house museums are held to a variety of standards, including those of the International Council of Museums., Subject: ford green hall, Relation: material_used, Options: (A) concrete (B) wood
wood