\begin{Schunk}
\begin{Sinput}
 ## The demonstration data - a subset of HBSC
 ## Health Behaviour in School-Aged Children
 names(hbsc)
\end{Sinput}
\begin{Soutput}
 [1] "stud_id"  "schl_id"  "Gender"   "Age"      "Grade"    "body1_o"  "body2_o"  "body3_o" 
 [9] "body4_o"  "body5_o"  "phys1_o"  "phys2_o"  "phys3_o"  "phys4_o"  "phys5_o"  "phys6_o" 
[17] "phys7_o"  "phys8_o"  "depre1_o" "depre2_o" "depre3_o" "depre4_o" "depre5_o" "depre6_o"
[25] "gotBu1_o" "gotBu2_o" "gotBu3_o" "gotBu4_o" "gotBu5_o" "gotBu6_o" "gotBu7_o" "gotBu8_o"
[33] "gotBu9_o" "buOth1_o" "buOth2_o" "buOth3_o" "buOth4_o" "buOth5_o" "buOth6_o" "buOth7_o"
[41] "buOth8_o" "buOth9_o" "alc1_o"   "alc2_o"   "alc3_o"   "alc4_o"   "alc5_o"   "body1_i" 
[49] "body2_i"  "body3_i"  "body4_i"  "body5_i"  "phys1_i"  "phys2_i"  "phys3_i"  "phys4_i" 
[57] "phys5_i"  "phys6_i"  "phys7_i"  "phys8_i"  "depre1_i" "depre2_i" "depre3_i" "depre4_i"
[65] "depre5_i" "depre6_i" "gotBu1_i" "gotBu2_i" "gotBu3_i" "gotBu4_i" "gotBu5_i" "gotBu6_i"
[73] "gotBu7_i" "gotBu8_i" "gotBu9_i" "buOth1_i" "buOth2_i" "buOth3_i" "buOth4_i" "buOth5_i"
[81] "buOth6_i" "buOth7_i" "buOth8_i" "buOth9_i" "alc1_i"   "alc2_i"   "alc3_i"   "alc4_i"  
[89] "alc5_i"  
\end{Soutput}
\end{Schunk}
