AnswerEX1-c

son of someone: {<x,y>/x is the son of y} = {<Tom,Paul>,<Tom,Alice>} father of someone: {<x,y>/ x is the father of y} ={<Paul,Tom>, <Paul, Lisa>} daughter of someone: {<x,y>/ x is the daughter of y} ={Lisa, Paul}, {Lisa, Alice} mother of someone: {<x,y>/ x is the mother of y} ={Alice, Lisa}, {Alice,Paul} enjoy watching football games together: {<x,y>/x enjoys watching football with y and y enjoys watching football with x} = {<Alice, Paul>, <Paul, Alice>, <Lisa, Alice>, <Alice, Lisa>,<Alice, Tom>, <Tom, Alice>, <Paul, Lisa>, <Lisa, Paul>, <Paul, Tom>, <Tom, Paul>, <Tom, Lisa>, <Lisa, Tom>}