Room is related to Wall. you are likely to find Calendar in/at/on Wall. Calendar is a synonym of Agenda. 
Inquiry is related to Ask. Ask is the opposite of Reply. Reply is related to Communication. 
Room <--RelatedTo--> Wall <--AtLocation-- Calendar <--Synonym--> Agenda 
Inquiry <--RelatedTo--> Ask <--Antonym--> Reply <--RelatedTo--> Communication 